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class="mw-redirectedfrom">(Redirected from <a href="/w/index.php?title=Chalcogen_hydride&redirect=no" class="mw-redirect" title="Chalcogen hydride">Chalcogen hydride</a>)</span></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="en" dir="ltr"><style data-mw-deduplicate="TemplateStyles:r1237032888/mw-parser-output/.tmulti">.mw-parser-output .tmulti .multiimageinner{display:flex;flex-direction:column}.mw-parser-output .tmulti .trow{display:flex;flex-direction:row;clear:left;flex-wrap:wrap;width:100%;box-sizing:border-box}.mw-parser-output .tmulti .tsingle{margin:1px;float:left}.mw-parser-output .tmulti .theader{clear:both;font-weight:bold;text-align:center;align-self:center;background-color:transparent;width:100%}.mw-parser-output .tmulti .thumbcaption{background-color:transparent}.mw-parser-output .tmulti .text-align-left{text-align:left}.mw-parser-output .tmulti .text-align-right{text-align:right}.mw-parser-output .tmulti 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srcset="//upload.wikimedia.org/wikipedia/commons/thumb/3/34/Hydrogen-sulfide-3D-balls.png/158px-Hydrogen-sulfide-3D-balls.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/3/34/Hydrogen-sulfide-3D-balls.png/210px-Hydrogen-sulfide-3D-balls.png 2x" data-file-width="1100" data-file-height="779" /></a></span></div></div></div><div class="trow"><div class="tsingle" style="width:107px;max-width:107px"><div class="thumbimage"><span typeof="mw:File"><a href="/wiki/File:Hydrogen-selenide-3D-balls.png" class="mw-file-description"><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/c/c6/Hydrogen-selenide-3D-balls.png/105px-Hydrogen-selenide-3D-balls.png" decoding="async" width="105" height="73" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/c/c6/Hydrogen-selenide-3D-balls.png/158px-Hydrogen-selenide-3D-balls.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/c/c6/Hydrogen-selenide-3D-balls.png/210px-Hydrogen-selenide-3D-balls.png 2x" data-file-width="1100" data-file-height="766" /></a></span></div><div class="thumbcaption">Water, hydrogen sulfide, and hydrogen selenide, three simple hydrogen chalcogenides</div></div></div></div></div><p><b>Hydrogen chalcogenides</b> (also <b>chalcogen hydrides</b> or <b>hydrogen chalcides</b>) are <a href="/wiki/Binary_compounds_of_hydrogen" title="Binary compounds of hydrogen">binary compounds of hydrogen</a> with <a href="/wiki/Chalcogen" title="Chalcogen">chalcogen</a> atoms (elements of group 16: <a href="/wiki/Oxygen" title="Oxygen">oxygen</a>, <a href="/wiki/Sulfur" title="Sulfur">sulfur</a>, <a href="/wiki/Selenium" title="Selenium">selenium</a>, <a href="/wiki/Tellurium" title="Tellurium">tellurium</a>, <a href="/wiki/Polonium" title="Polonium">polonium</a>, and <a href="/wiki/Livermorium" title="Livermorium">livermorium</a>). <a href="/wiki/Water" title="Water">Water</a>, the first <a href="/wiki/Chemical_compound" title="Chemical compound">chemical compound</a> in this series, contains one oxygen atom and two <a href="/wiki/Hydrogen" title="Hydrogen">hydrogen</a> atoms, and is the most common compound on the Earth's surface.<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> </p><meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Dihydrogen_chalcogenides">Dihydrogen chalcogenides</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Hydrogen_chalcogenide&action=edit&section=1" title="Edit section: Dihydrogen chalcogenides"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The most important series, including water, has the chemical formula H<sub>2</sub>X, with X representing any chalcogen. They are therefore <a href="/wiki/Triatomic" class="mw-redirect" title="Triatomic">triatomic</a>. They take on a <a href="/wiki/Bent_molecular_geometry" title="Bent molecular geometry">bent structure</a> and as such are <a href="/wiki/Polar_molecule" class="mw-redirect" title="Polar molecule">polar molecules</a>. Water is an essential compound to <a href="/wiki/Life" title="Life">life</a> on <a href="/wiki/Earth" title="Earth">Earth</a> today,<sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> covering 70.9% of the planet's surface. The other hydrogen chalcogenides are usually extremely toxic, and have strong unpleasant scents usually resembling rotting eggs or vegetables. Hydrogen sulfide is a common product of decomposition in <a href="/wiki/Oxygen" title="Oxygen">oxygen</a>-poor environments and as such is one chemical responsible for the smell of <a href="/wiki/Flatulence" title="Flatulence">flatulence</a>. It is also a <a href="/wiki/Volcanic_gas" title="Volcanic gas">volcanic gas</a>. Despite its toxicity, the <a href="/wiki/Human_body" title="Human body">human body</a> intentionally produces it in small quantities for use as a <a href="/wiki/Signaling_molecule" class="mw-redirect" title="Signaling molecule">signaling molecule</a>. </p><p>Water can <a href="/wiki/Solubility" title="Solubility">dissolve</a> the other hydrogen chalcogenides (at least those up to hydrogen telluride), forming <a href="/wiki/Acid" title="Acid">acidic</a> solutions known as <b>hydrochalcogenic acids</b>. Although these are weaker acids than the <a href="/wiki/Hydrohalic_acid" class="mw-redirect" title="Hydrohalic acid">hydrohalic acids</a>, they follow a similar trend of acid strength increasing with heavier chalcogens, and also form in a similar way (turning the water into a <a href="/wiki/Hydronium" title="Hydronium">hydronium</a> ion H<sub>3</sub>O<sup>+</sup> and the solute into a XH<sup>−</sup> ion). It is unknown if polonium hydride forms an acidic solution in water like its lighter homologues, or if it behaves more like a metal hydride (see also <a href="/wiki/Hydrogen_astatide" title="Hydrogen astatide">hydrogen astatide</a>). </p> <table class="wikitable" style="margin: 1em auto 1em auto"> <tbody><tr> <th>Compound</th> <th>As <a href="/wiki/Aqueous_solution" title="Aqueous solution">aqueous solution</a></th> <th><a href="/wiki/Chemical_formula" title="Chemical formula">Chemical formula</a></th> <th>Geometry</th> <th><a href="/wiki/Acid_dissociation_constant" title="Acid dissociation constant">p<i>K</i><sub>a</sub></a></th> <th>model </th></tr> <tr style="text-align: center;"> <td><a href="/wiki/Properties_of_water" title="Properties of water">hydrogen oxide</a><br />oxygen hydride<br />water<br />(oxidane)</td> <td><a href="/wiki/Self-ionization_of_water" title="Self-ionization of water">water</a></td> <td><style data-mw-deduplicate="TemplateStyles:r1123817410">.mw-parser-output .template-chem2-su{display:inline-block;font-size:80%;line-height:1;vertical-align:-0.35em}.mw-parser-output .template-chem2-su>span{display:block;text-align:left}.mw-parser-output sub.template-chem2-sub{font-size:80%;vertical-align:-0.35em}.mw-parser-output sup.template-chem2-sup{font-size:80%;vertical-align:0.65em}</style><span class="chemf nowrap">H<sub class="template-chem2-sub">2</sub>O</span></td> <td><span typeof="mw:File"><a href="/wiki/File:H2O_2D_labelled.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/b/b7/H2O_2D_labelled.svg/90px-H2O_2D_labelled.svg.png" decoding="async" width="90" height="39" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/b/b7/H2O_2D_labelled.svg/135px-H2O_2D_labelled.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/b/b7/H2O_2D_labelled.svg/180px-H2O_2D_labelled.svg.png 2x" data-file-width="800" data-file-height="350" /></a></span></td> <td>13.995</td> <td><span typeof="mw:File"><a href="/wiki/File:Water_molecule_3D.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/1/1c/Water_molecule_3D.svg/100px-Water_molecule_3D.svg.png" decoding="async" width="100" height="86" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/1/1c/Water_molecule_3D.svg/150px-Water_molecule_3D.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/1/1c/Water_molecule_3D.svg/200px-Water_molecule_3D.svg.png 2x" data-file-width="600" data-file-height="515" /></a></span> </td></tr> <tr style="text-align: center;"> <td><a href="/wiki/Hydrogen_sulfide" title="Hydrogen sulfide">hydrogen sulfide</a><br />sulfur hydride<br />(sulfane)</td> <td><a href="/wiki/Hydrosulfuric_acid" class="mw-redirect" title="Hydrosulfuric acid">hydrosulfuric acid</a></td> <td><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">H<sub class="template-chem2-sub">2</sub>S</span></td> <td><span typeof="mw:File"><a href="/wiki/File:Hydrogen-sulfide-2D-dimensions.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/c/c6/Hydrogen-sulfide-2D-dimensions.svg/90px-Hydrogen-sulfide-2D-dimensions.svg.png" decoding="async" width="90" height="53" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/c/c6/Hydrogen-sulfide-2D-dimensions.svg/135px-Hydrogen-sulfide-2D-dimensions.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/c/c6/Hydrogen-sulfide-2D-dimensions.svg/180px-Hydrogen-sulfide-2D-dimensions.svg.png 2x" data-file-width="344" data-file-height="201" /></a></span></td> <td>7.0</td> <td><span typeof="mw:File"><a href="/wiki/File:Hydrogen-sulfide-3D-vdW.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/6/65/Hydrogen-sulfide-3D-vdW.svg/100px-Hydrogen-sulfide-3D-vdW.svg.png" decoding="async" width="100" height="99" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/6/65/Hydrogen-sulfide-3D-vdW.svg/150px-Hydrogen-sulfide-3D-vdW.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/6/65/Hydrogen-sulfide-3D-vdW.svg/200px-Hydrogen-sulfide-3D-vdW.svg.png 2x" data-file-width="367" data-file-height="365" /></a></span> </td></tr> <tr style="text-align: center;"> <td><a href="/wiki/Hydrogen_selenide" title="Hydrogen selenide">hydrogen selenide</a><br />selenium hydride<br />(selane)</td> <td><a href="/wiki/Hydroselenic_acid" class="mw-redirect" title="Hydroselenic acid">hydroselenic acid</a></td> <td><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">H<sub class="template-chem2-sub">2</sub>Se</span></td> <td><span typeof="mw:File"><a href="/wiki/File:Hydrogen-selenide-2D-dimensions.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/7/7f/Hydrogen-selenide-2D-dimensions.svg/90px-Hydrogen-selenide-2D-dimensions.svg.png" decoding="async" width="90" height="53" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/7f/Hydrogen-selenide-2D-dimensions.svg/135px-Hydrogen-selenide-2D-dimensions.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/7f/Hydrogen-selenide-2D-dimensions.svg/180px-Hydrogen-selenide-2D-dimensions.svg.png 2x" data-file-width="1096" data-file-height="647" /></a></span></td> <td>3.89</td> <td><span typeof="mw:File"><a href="/wiki/File:Hydrogen-selenide-3D-vdW.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/f/fd/Hydrogen-selenide-3D-vdW.svg/100px-Hydrogen-selenide-3D-vdW.svg.png" decoding="async" width="100" height="98" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/f/fd/Hydrogen-selenide-3D-vdW.svg/150px-Hydrogen-selenide-3D-vdW.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/f/fd/Hydrogen-selenide-3D-vdW.svg/200px-Hydrogen-selenide-3D-vdW.svg.png 2x" data-file-width="1092" data-file-height="1066" /></a></span> </td></tr> <tr style="text-align: center;"> <td><a href="/wiki/Hydrogen_telluride" title="Hydrogen telluride">hydrogen telluride</a><br />tellurium hydride<br />(tellane)</td> <td><a href="/wiki/Hydrotelluric_acid" class="mw-redirect" title="Hydrotelluric acid">hydrotelluric acid</a></td> <td><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">H<sub class="template-chem2-sub">2</sub>Te</span></td> <td><span typeof="mw:File"><a href="/wiki/File:Hydrogen-telluride-2D-dimensions.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/3/3e/Hydrogen-telluride-2D-dimensions.svg/90px-Hydrogen-telluride-2D-dimensions.svg.png" decoding="async" width="90" height="53" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/3/3e/Hydrogen-telluride-2D-dimensions.svg/135px-Hydrogen-telluride-2D-dimensions.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/3/3e/Hydrogen-telluride-2D-dimensions.svg/180px-Hydrogen-telluride-2D-dimensions.svg.png 2x" data-file-width="1099" data-file-height="647" /></a></span></td> <td>2.6</td> <td><span typeof="mw:File"><a href="/wiki/File:Hydrogen-telluride-3D-vdW.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/4/4e/Hydrogen-telluride-3D-vdW.svg/100px-Hydrogen-telluride-3D-vdW.svg.png" decoding="async" width="100" height="106" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/4e/Hydrogen-telluride-3D-vdW.svg/150px-Hydrogen-telluride-3D-vdW.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/4/4e/Hydrogen-telluride-3D-vdW.svg/200px-Hydrogen-telluride-3D-vdW.svg.png 2x" data-file-width="1015" data-file-height="1080" /></a></span> </td></tr> <tr style="text-align: center;"> <td><a href="/wiki/Polonium_hydride" title="Polonium hydride">hydrogen polonide</a><br />polonium hydride<br />(polane)</td> <td><a href="/wiki/Hydropolonic_acid" class="mw-redirect" title="Hydropolonic acid">hydropolonic acid</a></td> <td><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">H<sub class="template-chem2-sub">2</sub>Po</span></td> <td><span typeof="mw:File"><a href="/wiki/File:Poloniumwasserstoff.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/0/09/Poloniumwasserstoff.svg/90px-Poloniumwasserstoff.svg.png" decoding="async" width="90" height="41" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/0/09/Poloniumwasserstoff.svg/135px-Poloniumwasserstoff.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/0/09/Poloniumwasserstoff.svg/180px-Poloniumwasserstoff.svg.png 2x" data-file-width="82" data-file-height="37" /></a></span></td> <td>?</td> <td><span typeof="mw:File"><a href="/wiki/File:Polonium-hydride-3D-vdW.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/5/52/Polonium-hydride-3D-vdW.svg/100px-Polonium-hydride-3D-vdW.svg.png" decoding="async" width="100" height="100" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/5/52/Polonium-hydride-3D-vdW.svg/150px-Polonium-hydride-3D-vdW.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/5/52/Polonium-hydride-3D-vdW.svg/200px-Polonium-hydride-3D-vdW.svg.png 2x" data-file-width="528" data-file-height="527" /></a></span> </td></tr> <tr style="text-align: center;"> <td><a href="/wiki/Livermorium#Chemical" title="Livermorium">hydrogen livermoride</a><br />livermorium hydride<br />(livermorane)</td> <td>hydrolivermoric acid</td> <td><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">H<sub class="template-chem2-sub">2</sub>Lv</span></td> <td></td> <td>?</td> <td><span typeof="mw:File/Frameless"><a href="/wiki/File:Livermorium-hydride-3D-balls.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/2/26/Livermorium-hydride-3D-balls.png/100px-Livermorium-hydride-3D-balls.png" decoding="async" width="100" height="90" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/2/26/Livermorium-hydride-3D-balls.png/150px-Livermorium-hydride-3D-balls.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/2/26/Livermorium-hydride-3D-balls.png/200px-Livermorium-hydride-3D-balls.png 2x" data-file-width="704" data-file-height="636" /></a></span> </td></tr></tbody></table> <p>Some properties of the hydrogen chalcogenides follow:<sup id="cite_ref-Greenwood766_3-0" class="reference"><a href="#cite_note-Greenwood766-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> </p> <table class="wikitable" style="margin: 1em auto 1em auto"> <tbody><tr> <th>Property</th> <th><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">H<sub class="template-chem2-sub">2</sub>O</span></th> <th><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">H<sub class="template-chem2-sub">2</sub>S</span></th> <th><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">H<sub class="template-chem2-sub">2</sub>Se</span></th> <th><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">H<sub class="template-chem2-sub">2</sub>Te</span></th> <th><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">H<sub class="template-chem2-sub">2</sub>Po</span> </th></tr> <tr> <th>Melting point (°C) </th> <td>0.0</td> <td>−85.6</td> <td>−65.7</td> <td>−51</td> <td>−35.3 </td></tr> <tr> <th>Boiling point (°C) </th> <td>100.0</td> <td>−60.3</td> <td>−41.3</td> <td>−4</td> <td>36.1 </td></tr> <tr> <th><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle \Delta H_{f}^{\circ }\left(\mathrm {kJ\cdot mol} ^{-1}\right)}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi mathvariant="normal">Δ</mi> <msubsup> <mi>H</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>f</mi> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mo>∘</mo> </mrow> </msubsup> <mrow> <mo>(</mo> <msup> <mrow class="MJX-TeXAtom-ORD"> <mi mathvariant="normal">k</mi> <mi mathvariant="normal">J</mi> <mo>⋅</mo> <mi mathvariant="normal">m</mi> <mi mathvariant="normal">o</mi> <mi mathvariant="normal">l</mi> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mo>−</mo> <mn>1</mn> </mrow> </msup> <mo>)</mo> </mrow> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle \Delta H_{f}^{\circ }\left(\mathrm {kJ\cdot mol} ^{-1}\right)}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/3102c936f9d8f7dce128c1eaf7f8a70dd985c885" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -1.338ex; width:17.79ex; height:3.676ex;" alt="{\displaystyle \Delta H_{f}^{\circ }\left(\mathrm {kJ\cdot mol} ^{-1}\right)}"></span> </th> <td>−285.9</td> <td>+20.1</td> <td>+73.0</td> <td>+99.6</td> <td>? </td></tr> <tr> <th>Bond angle (H–X–H) (gas) </th> <td>104.45°</td> <td>92.1°</td> <td>91°</td> <td>90°</td> <td>90.9° (predicted)<sup id="cite_ref-Sumathi_4-0" class="reference"><a href="#cite_note-Sumathi-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> </td></tr> <tr> <th>Dissociation constant (HX<sup>−</sup>, <i>K</i><sub>1</sub>) </th> <td>1.8 × 10<sup>−16</sup> </td> <td>1.3 × 10<sup>−7</sup> </td> <td>1.3 × 10<sup>−4</sup> </td> <td>2.3 × 10<sup>−3</sup> </td> <td>? </td></tr> <tr> <th>Dissociation constant (X<sup>2−</sup>, <i>K</i><sub>2</sub>) </th> <td>0 </td> <td>7.1 × 10<sup>−15</sup> </td> <td>1 × 10<sup>−11</sup> </td> <td>1.6 × 10<sup>−11</sup> </td> <td>? </td></tr></tbody></table> <figure class="mw-default-size mw-halign-right" typeof="mw:File/Thumb"><a href="/wiki/File:Boiling-points_Chalcogen-Halogen.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/2/2b/Boiling-points_Chalcogen-Halogen.svg/220px-Boiling-points_Chalcogen-Halogen.svg.png" decoding="async" width="220" height="146" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/2/2b/Boiling-points_Chalcogen-Halogen.svg/330px-Boiling-points_Chalcogen-Halogen.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/2/2b/Boiling-points_Chalcogen-Halogen.svg/440px-Boiling-points_Chalcogen-Halogen.svg.png 2x" data-file-width="337" data-file-height="224" /></a><figcaption>Comparison of the boiling points of the hydrogen chalcogenides and <a href="/wiki/Hydrogen_halide" title="Hydrogen halide">hydrogen halides</a>; it can be seen that <a href="/wiki/Hydrogen_fluoride" title="Hydrogen fluoride">hydrogen fluoride</a> similarly exhibits anomalous effects due to hydrogen bonding. <a href="/wiki/Ammonia" title="Ammonia">Ammonia</a> also misbehaves similarly.</figcaption></figure> <figure class="mw-default-size mw-halign-right" typeof="mw:File/Thumb"><a href="/wiki/File:Mp_and_bp_of_H2E_(E%3DO,S,Se,Te,Po)_Celsius_vs_atomic_number.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/b/bd/Mp_and_bp_of_H2E_%28E%3DO%2CS%2CSe%2CTe%2CPo%29_Celsius_vs_atomic_number.svg/220px-Mp_and_bp_of_H2E_%28E%3DO%2CS%2CSe%2CTe%2CPo%29_Celsius_vs_atomic_number.svg.png" decoding="async" width="220" height="318" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/b/bd/Mp_and_bp_of_H2E_%28E%3DO%2CS%2CSe%2CTe%2CPo%29_Celsius_vs_atomic_number.svg/330px-Mp_and_bp_of_H2E_%28E%3DO%2CS%2CSe%2CTe%2CPo%29_Celsius_vs_atomic_number.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/b/bd/Mp_and_bp_of_H2E_%28E%3DO%2CS%2CSe%2CTe%2CPo%29_Celsius_vs_atomic_number.svg/440px-Mp_and_bp_of_H2E_%28E%3DO%2CS%2CSe%2CTe%2CPo%29_Celsius_vs_atomic_number.svg.png 2x" data-file-width="325" data-file-height="470" /></a><figcaption>Comparison of the melting (blue) and boiling (red) points of the hydrogen chalcogenides. The blue and red lines are least sqares fits for the non-oxygen chalcogenides, showing water should melt at -88 °C and boil at -75 °C.</figcaption></figure> <p>Many of the anomalous properties of water compared to the rest of the hydrogen chalcogenides may be attributed to significant <a href="/wiki/Hydrogen_bonding" class="mw-redirect" title="Hydrogen bonding">hydrogen bonding</a> between hydrogen and oxygen atoms. Some of these properties are the high melting and boiling points (it is a liquid at room temperature), as well as the high <a href="/wiki/Dielectric_constant" class="mw-redirect" title="Dielectric constant">dielectric constant</a> and observable ionic dissociation. Hydrogen bonding in water also results in large values of heat and entropy of vaporisation, surface tension, and viscosity.<sup id="cite_ref-Greenwood623_5-0" class="reference"><a href="#cite_note-Greenwood623-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> </p><p>The other hydrogen chalcogenides are highly toxic, malodorous gases. Hydrogen sulfide occurs commonly in nature and its properties compared with water reveal a lack of any significant hydrogen bonding.<sup id="cite_ref-Greenwood682_6-0" class="reference"><a href="#cite_note-Greenwood682-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> Since they are both gases at STP, hydrogen can be simply burned in the presence of oxygen to form water in a highly <a href="/wiki/Exothermic" class="mw-redirect" title="Exothermic">exothermic</a> reaction; such a test can be used in beginner chemistry to test for the gases produced by a reaction as hydrogen will burn with a pop. Water, hydrogen sulfide, and hydrogen selenide may be made by heating their constituent elements together above 350 °C, but hydrogen telluride and polonium hydride are not attainable by this method due to their thermal instability; hydrogen telluride decomposes in moisture, in light, and in temperatures above 0 °C. Polonium hydride is unstable, and due to the intense radioactivity of polonium (resulting in self-<a href="/wiki/Radiolysis" title="Radiolysis">radiolysis</a> upon formation), only trace quantities may be obtained by treating dilute <a href="/wiki/Hydrochloric_acid" title="Hydrochloric acid">hydrochloric acid</a> with polonium-plated <a href="/wiki/Magnesium" title="Magnesium">magnesium</a> foil. Its properties are somewhat distinct from the rest of the hydrogen chalcogenides, since polonium is a metal while the other chalcogens are not, and hence this compound is intermediate between a normal hydrogen chalcogenide or <a href="/wiki/Hydrogen_halide" title="Hydrogen halide">hydrogen halide</a> such as <a href="/wiki/Hydrogen_chloride" title="Hydrogen chloride">hydrogen chloride</a>, and a metal hydride like <a href="/wiki/Stannane" title="Stannane">stannane</a>. Like water, the first of the group, polonium hydride is also a liquid at room temperature. Unlike water, however, the strong intermolecular attractions that cause the higher boiling point are <a href="/wiki/Van_der_Waals_interaction" class="mw-redirect" title="Van der Waals interaction">van der Waals interactions</a>, an effect of the large electron clouds of polonium.<sup id="cite_ref-Greenwood766_3-1" class="reference"><a href="#cite_note-Greenwood766-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Dihydrogen_dichalcogenides">Dihydrogen dichalcogenides</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Hydrogen_chalcogenide&action=edit&section=2" title="Edit section: Dihydrogen dichalcogenides"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Dihydrogen dichalcogenides have the chemical formula H<sub>2</sub>X<sub>2</sub>, and are generally less stable than the monochalcogenides, commonly decomposing into the monochalcogenide and the chalcogen involved. </p><p>The most important of these is <a href="/wiki/Hydrogen_peroxide" title="Hydrogen peroxide">hydrogen peroxide</a>, H<sub>2</sub>O<sub>2</sub>, a pale blue, nearly colourless liquid that has a lower volatility than water and a higher density and viscosity. It is important chemically as it can be either oxidised or reduced in solutions of any pH, can readily form peroxometal complexes and peroxoacid complexes, as well as undergoing many proton acid/base reactions. In its less concentrated form hydrogen peroxide has some major household uses, such as a disinfectant or for bleaching hair; <a href="/wiki/High-test_peroxide" title="High-test peroxide">much more concentrated solutions</a> are much more dangerous. </p> <table class="wikitable" style="margin: 1em auto 1em auto"> <tbody><tr> <th>Compound</th> <th><a href="/wiki/Chemical_formula" title="Chemical formula">Chemical formula</a></th> <th>Bond length</th> <th>Model </th></tr> <tr> <td style="text-align:center;"><a href="/wiki/Hydrogen_peroxide" title="Hydrogen peroxide">hydrogen peroxide</a><br />(dioxidane)</td> <td style="text-align:center;">H<sub>2</sub>O<sub>2</sub></td> <td><figure class="mw-halign-center" typeof="mw:File"><a href="/wiki/File:Wasserstoffperoxid.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/8/8e/Wasserstoffperoxid.svg/90px-Wasserstoffperoxid.svg.png" decoding="async" width="90" height="51" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/8/8e/Wasserstoffperoxid.svg/135px-Wasserstoffperoxid.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/8/8e/Wasserstoffperoxid.svg/180px-Wasserstoffperoxid.svg.png 2x" data-file-width="94" data-file-height="53" /></a><figcaption></figcaption></figure></td> <td><figure class="mw-halign-center" typeof="mw:File"><a href="/wiki/File:Hydrogen-peroxide-3D-vdW.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/c/ce/Hydrogen-peroxide-3D-vdW.png/100px-Hydrogen-peroxide-3D-vdW.png" decoding="async" width="100" height="78" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/c/ce/Hydrogen-peroxide-3D-vdW.png/150px-Hydrogen-peroxide-3D-vdW.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/c/ce/Hydrogen-peroxide-3D-vdW.png/200px-Hydrogen-peroxide-3D-vdW.png 2x" data-file-width="1100" data-file-height="862" /></a><figcaption></figcaption></figure> </td></tr> <tr> <td style="text-align:center;"><a href="/wiki/Hydrogen_disulfide" title="Hydrogen disulfide">hydrogen disulfide</a><br />(disulfane)</td> <td style="text-align:center;">H<sub>2</sub>S<sub>2</sub></td> <td><figure class="mw-halign-center" typeof="mw:File"><a href="/wiki/File:Hydrogen_disulfide_bonds.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/d/d1/Hydrogen_disulfide_bonds.png/90px-Hydrogen_disulfide_bonds.png" decoding="async" width="90" height="45" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/d/d1/Hydrogen_disulfide_bonds.png/135px-Hydrogen_disulfide_bonds.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/d/d1/Hydrogen_disulfide_bonds.png/180px-Hydrogen_disulfide_bonds.png 2x" data-file-width="498" data-file-height="247" /></a><figcaption></figcaption></figure></td> <td><figure class="mw-halign-center" typeof="mw:File"><a href="/wiki/File:Hydrogen-disulfide-3D-vdW.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/e/e4/Hydrogen-disulfide-3D-vdW.png/100px-Hydrogen-disulfide-3D-vdW.png" decoding="async" width="100" height="76" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/e/e4/Hydrogen-disulfide-3D-vdW.png/150px-Hydrogen-disulfide-3D-vdW.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/e/e4/Hydrogen-disulfide-3D-vdW.png/200px-Hydrogen-disulfide-3D-vdW.png 2x" data-file-width="1052" data-file-height="795" /></a><figcaption></figcaption></figure> </td></tr> <tr> <td style="text-align:center;"><a href="/wiki/Hydrogen_diselenide" title="Hydrogen diselenide">hydrogen diselenide</a><sup id="cite_ref-7" class="reference"><a href="#cite_note-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup><br />(diselane)</td> <td style="text-align:center;">H<sub>2</sub>Se<sub>2</sub></td> <td style="text-align:center;">—</td> <td><figure class="mw-halign-center" typeof="mw:File"><a href="/wiki/File:Hydrogen-diselenide-3D-vdW.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/6/63/Hydrogen-diselenide-3D-vdW.png/100px-Hydrogen-diselenide-3D-vdW.png" decoding="async" width="100" height="80" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/6/63/Hydrogen-diselenide-3D-vdW.png/150px-Hydrogen-diselenide-3D-vdW.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/6/63/Hydrogen-diselenide-3D-vdW.png/200px-Hydrogen-diselenide-3D-vdW.png 2x" data-file-width="824" data-file-height="660" /></a><figcaption></figcaption></figure> </td></tr> <tr> <td style="text-align:center;"><a href="/wiki/Hydrogen_ditelluride" title="Hydrogen ditelluride">hydrogen ditelluride</a><sup id="cite_ref-8" class="reference"><a href="#cite_note-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup><br />(ditellane)</td> <td style="text-align:center;">H<sub>2</sub>Te<sub>2</sub></td> <td style="text-align:center;">—</td> <td><figure class="mw-halign-center" typeof="mw:File/Frameless"><a href="/wiki/File:Hydrogen-ditelluride-3D-vdW.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/e/e0/Hydrogen-ditelluride-3D-vdW.png/100px-Hydrogen-ditelluride-3D-vdW.png" decoding="async" width="100" height="76" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/e/e0/Hydrogen-ditelluride-3D-vdW.png/150px-Hydrogen-ditelluride-3D-vdW.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/e/e0/Hydrogen-ditelluride-3D-vdW.png/200px-Hydrogen-ditelluride-3D-vdW.png 2x" data-file-width="702" data-file-height="534" /></a><figcaption></figcaption></figure> </td></tr></tbody></table> <p>Some properties of the hydrogen dichalcogenides follow: </p> <table class="wikitable" style="margin: 1em auto 1em auto"> <tbody><tr> <th>Property </th> <th>H<sub>2</sub>O<sub>2</sub> </th> <th>H<sub>2</sub>S<sub>2</sub> </th> <th>H<sub>2</sub>Se<sub>2</sub> </th> <th>H<sub>2</sub>Te<sub>2</sub> </th></tr> <tr> <th>Melting point (°C) </th> <td>-0.43 </td> <td>−89.6 </td> <td>? </td> <td>? </td></tr> <tr> <th>Boiling point (°C) </th> <td>150.2 <sub>(decomposes)</sub> </td> <td>70.7 </td> <td>? </td> <td>? </td></tr></tbody></table> <p>An alternative <a href="/wiki/Structural_isomer" title="Structural isomer">structural isomer</a> of the dichalcogenides, in which both hydrogen atoms are bonded to the same chalcogen atom, which is also bonded to the other chalcogen atom, have been examined computationally. These H<sub>2</sub>X<sup>+</sup>–X<sup>–</sup> structures are <a href="/wiki/Ylide" title="Ylide">ylides</a>. This isomeric form of hydrogen peroxide, <a href="/w/index.php?title=Oxywater&action=edit&redlink=1" class="new" title="Oxywater (page does not exist)">oxywater</a>, has not been synthesized experimentally. The analogous isomer of hydrogen disulfide, <a href="/wiki/Thiosulfoxide" title="Thiosulfoxide">thiosulfoxide</a>, has been detected by <a href="/wiki/Mass_spectrometry" title="Mass spectrometry">mass spectrometry</a> experiments.<sup id="cite_ref-9" class="reference"><a href="#cite_note-9"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup> </p><p>It is possible for two different chalcogen atoms to share a dichalcogenide, as in <a href="/wiki/Hydrogen_thioperoxide" title="Hydrogen thioperoxide">hydrogen thioperoxide</a> (H<sub>2</sub>SO); more well-known compounds of similar description include <a href="/wiki/Sulfuric_acid" title="Sulfuric acid">sulfuric acid</a> (H<sub>2</sub>SO<sub>4</sub>). </p> <div class="mw-heading mw-heading2"><h2 id="Higher_dihydrogen_chalcogenides">Higher dihydrogen chalcogenides</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Hydrogen_chalcogenide&action=edit&section=3" title="Edit section: Higher dihydrogen chalcogenides"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>All straight-chain hydrogen chalcogenides follow the <a href="/wiki/Homologous_series" title="Homologous series">formula</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">H<sub class="template-chem2-sub">2</sub>X<sub class="template-chem2-sub"><i>n</i></sub></span>. </p><p>Higher <a href="/wiki/Hydrogen_polyoxide" title="Hydrogen polyoxide">hydrogen polyoxides</a> than <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">H<sub class="template-chem2-sub">2</sub>O<sub class="template-chem2-sub">2</sub></span> are not stable.<sup id="cite_ref-Greenwood633_10-0" class="reference"><a href="#cite_note-Greenwood633-10"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup> <a href="/wiki/Trioxidane" title="Trioxidane">Trioxidane</a>, with three oxygen atoms, is a transient unstable intermediate in several reactions. The next two in the oxygen series, <a href="/wiki/Tetraoxidane" title="Tetraoxidane">tetraoxidane</a> and <a href="/wiki/Hydrogen_pentoxide" class="mw-redirect" title="Hydrogen pentoxide">pentaoxidane</a>, have also been synthesized and found to be highly reactive. An alternative structural isomer of trioxidane, in which the two hydrogen atoms are attached to the central oxygen of the three-oxygen chain rather than one on each end, has been examined computationally.<sup id="cite_ref-DobadoJACS1999_11-0" class="reference"><a href="#cite_note-DobadoJACS1999-11"><span class="cite-bracket">[</span>11<span class="cite-bracket">]</span></a></sup> </p><p>Beyond <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">H<sub class="template-chem2-sub">2</sub>S</span> and <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">H<sub class="template-chem2-sub">2</sub>S<sub class="template-chem2-sub">2</sub></span>, many higher <a href="/wiki/Polysulfane" title="Polysulfane">polysulfanes</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">H<sub class="template-chem2-sub">2</sub>S<sub class="template-chem2-sub"><i>n</i></sub></span> (<i>n</i> = 3–8) are known as stable compounds.<sup id="cite_ref-RS_12-0" class="reference"><a href="#cite_note-RS-12"><span class="cite-bracket">[</span>12<span class="cite-bracket">]</span></a></sup> They feature unbranched sulfur chains, reflecting sulfur's tendency for catenation. Starting with <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">H<sub class="template-chem2-sub">2</sub>S<sub class="template-chem2-sub">2</sub></span>, all known polysulfanes are liquids at room temperature. <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">H<sub class="template-chem2-sub">2</sub>S<sub class="template-chem2-sub">2</sub></span> is colourless while the other polysulfanes are yellow; the colour becomes richer as <i>n</i> increases, as do the density, viscosity, and boiling point. A table of physical properties is given below.<sup id="cite_ref-Greenwood683_13-0" class="reference"><a href="#cite_note-Greenwood683-13"><span class="cite-bracket">[</span>13<span class="cite-bracket">]</span></a></sup> </p> <table class="wikitable" style="margin: 1em auto 1em auto"> <tbody><tr> <th>Compound </th> <th><a href="/wiki/Density" title="Density">Density</a> at 20 °C (g·cm<sup>−3</sup>) </th> <th><a href="/wiki/Vapour_pressure" class="mw-redirect" title="Vapour pressure">Vapour pressure</a> (<a href="/wiki/MmHg" class="mw-redirect" title="MmHg">mmHg</a>) </th> <th>Extrapolated <a href="/wiki/Boiling_point" title="Boiling point">boiling point</a> (<a href="/wiki/%C2%B0C" class="mw-redirect" title="°C">°C</a>) </th></tr> <tr> <th><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">H<sub class="template-chem2-sub">2</sub>S</span> </th> <td>1.363 (g·dm<sup>−3</sup>) </td> <td>1740 (kPa, 21 °C) </td> <td>−60 </td></tr> <tr> <th><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">H<sub class="template-chem2-sub">2</sub>S<sub class="template-chem2-sub">2</sub></span> </th> <td>1.334 </td> <td>87.7 </td> <td>70 </td></tr> <tr> <th><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">H<sub class="template-chem2-sub">2</sub>S<sub class="template-chem2-sub">3</sub></span> </th> <td>1.491 </td> <td>1.4 </td> <td>170 </td></tr> <tr> <th><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">H<sub class="template-chem2-sub">2</sub>S<sub class="template-chem2-sub">4</sub></span> </th> <td>1.582 </td> <td>0.035 </td> <td>240 </td></tr> <tr> <th><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">H<sub class="template-chem2-sub">2</sub>S<sub class="template-chem2-sub">5</sub></span> </th> <td>1.644 </td> <td>0.0012 </td> <td>285 </td></tr> <tr> <th><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">H<sub class="template-chem2-sub">2</sub>S<sub class="template-chem2-sub">6</sub></span> </th> <td>1.688 </td> <td>? </td> <td>? </td></tr> <tr> <th><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">H<sub class="template-chem2-sub">2</sub>S<sub class="template-chem2-sub">7</sub></span> </th> <td>1.721 </td> <td>? </td> <td>? </td></tr> <tr> <th><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">H<sub class="template-chem2-sub">2</sub>S<sub class="template-chem2-sub">8</sub></span> </th> <td>1.747 </td> <td>? </td> <td>? </td></tr></tbody></table> <p>However, they can easily be oxidised and are all thermally unstable, disproportionating readily to sulfur and hydrogen sulfide, a reaction for which alkali acts as a catalyst:<sup id="cite_ref-Greenwood683_13-1" class="reference"><a href="#cite_note-Greenwood683-13"><span class="cite-bracket">[</span>13<span class="cite-bracket">]</span></a></sup> </p> <dl><dd><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">8 H<sub class="template-chem2-sub">2</sub>S<sub class="template-chem2-sub"><i>n</i></sub> → 8 H<sub class="template-chem2-sub">2</sub>S + (<i>n</i> − 1) S<sub class="template-chem2-sub">8</sub></span></dd></dl> <p>They also react with <a href="/wiki/Sulfite" title="Sulfite">sulfite</a> and <a href="/wiki/Cyanide" title="Cyanide">cyanide</a> to produce <a href="/wiki/Thiosulfate" title="Thiosulfate">thiosulfate</a> and <a href="/wiki/Thiocyanate" title="Thiocyanate">thiocyanate</a> respectively.<sup id="cite_ref-Greenwood683_13-2" class="reference"><a href="#cite_note-Greenwood683-13"><span class="cite-bracket">[</span>13<span class="cite-bracket">]</span></a></sup> </p><p>An alternative structural isomer of the trisulfide, in which the two hydrogen atoms are attached to the central sulfur of the three-sulfur chain rather than one on each end, has been examined computationally.<sup id="cite_ref-DobadoJACS1999_11-1" class="reference"><a href="#cite_note-DobadoJACS1999-11"><span class="cite-bracket">[</span>11<span class="cite-bracket">]</span></a></sup> <a href="/wiki/Thiosulfurous_acid" title="Thiosulfurous acid">Thiosulfurous acid</a>, a branched isomer of the tetrasulfide, in which the fourth sulfur is bonded to the central sulfur of a linear dihydrogen trisulfide structure (<link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">(HS)<sub class="template-chem2-sub">2</sub>S<sup class="template-chem2-sup">+</sup>−S<sup class="template-chem2-sup">−</sup></span>), has also been examined computationally.<sup id="cite_ref-14" class="reference"><a href="#cite_note-14"><span class="cite-bracket">[</span>14<span class="cite-bracket">]</span></a></sup> <a href="/wiki/Thiosulfuric_acid" title="Thiosulfuric acid">Thiosulfuric acid</a>, in which two sulfur atoms branch off of the central of a linear dihydrogen trisulfide structure has been studied computationally as well.<sup id="cite_ref-15" class="reference"><a href="#cite_note-15"><span class="cite-bracket">[</span>15<span class="cite-bracket">]</span></a></sup> </p><p>Higher polonium hydrides may exist.<sup id="cite_ref-16" class="reference"><a href="#cite_note-16"><span class="cite-bracket">[</span>16<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Other_hydrogen-chalcogen_compounds">Other hydrogen-chalcogen compounds</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Hydrogen_chalcogenide&action=edit&section=4" title="Edit section: Other hydrogen-chalcogen compounds"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-halign-right" typeof="mw:File/Thumb"><a href="/wiki/File:Heavy-water-3D-vdW.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/e/e4/Heavy-water-3D-vdW.svg/125px-Heavy-water-3D-vdW.svg.png" decoding="async" width="125" height="111" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/e/e4/Heavy-water-3D-vdW.svg/188px-Heavy-water-3D-vdW.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/e/e4/Heavy-water-3D-vdW.svg/250px-Heavy-water-3D-vdW.svg.png 2x" data-file-width="449" data-file-height="397" /></a><figcaption>Heavy water</figcaption></figure> <p>Some monohydrogen chalcogenide compounds do exist and others have been studied theoretically. As <a href="/wiki/Radical_(chemistry)" title="Radical (chemistry)">radical compounds</a>, they are quite unstable. The two simplest are <a href="/wiki/Hydroxyl_radical" title="Hydroxyl radical">hydroxyl</a> (HO) and <a href="/wiki/Hydroperoxyl" title="Hydroperoxyl">hydroperoxyl</a> (HO<sub>2</sub>). The compound <a href="/wiki/Hydrogen_ozonide" title="Hydrogen ozonide">hydrogen ozonide</a> (HO<sub>3</sub>) is also known,<sup id="cite_ref-17" class="reference"><a href="#cite_note-17"><span class="cite-bracket">[</span>17<span class="cite-bracket">]</span></a></sup> along with some of its <a href="/wiki/Alkali_metal" title="Alkali metal">alkali metal</a> <a href="/wiki/Ozonide" title="Ozonide">ozonide</a> salts are (various MO<sub>3</sub>).<sup id="cite_ref-WibergD_18-0" class="reference"><a href="#cite_note-WibergD-18"><span class="cite-bracket">[</span>18<span class="cite-bracket">]</span></a></sup> The respective sulfur analogue for hydroxyl is <a href="/wiki/Sulfanyl" title="Sulfanyl">sulfanyl</a> (HS) and HS<sub>2</sub> for hydroperoxyl. </p> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1237032888/mw-parser-output/.tmulti"><div class="thumb tmulti tright"><div class="thumbinner multiimageinner" style="width:109px;max-width:109px"><div class="trow"><div class="tsingle" style="width:107px;max-width:107px"><div class="thumbimage"><span typeof="mw:File"><a href="/wiki/File:Hydroxide-3D-balls.png" class="mw-file-description"><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/0/07/Hydroxide-3D-balls.png/105px-Hydroxide-3D-balls.png" decoding="async" width="105" height="64" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/0/07/Hydroxide-3D-balls.png/158px-Hydroxide-3D-balls.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/0/07/Hydroxide-3D-balls.png/210px-Hydroxide-3D-balls.png 2x" data-file-width="1100" data-file-height="673" /></a></span></div><div class="thumbcaption">HO<sup>−</sup></div></div></div><div class="trow"><div class="tsingle" style="width:107px;max-width:107px"><div class="thumbimage"><span typeof="mw:File"><a href="/wiki/File:Water-3D-balls.png" class="mw-file-description"><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/b/b4/Water-3D-balls.png/105px-Water-3D-balls.png" decoding="async" width="105" height="71" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/b/b4/Water-3D-balls.png/158px-Water-3D-balls.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/b/b4/Water-3D-balls.png/210px-Water-3D-balls.png 2x" data-file-width="1100" data-file-height="747" /></a></span></div><div class="thumbcaption">H<sub>2</sub>O</div></div></div><div class="trow"><div class="tsingle" style="width:107px;max-width:107px"><div class="thumbimage"><span typeof="mw:File"><a href="/wiki/File:Hydronium-3D-balls.png" class="mw-file-description"><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/e/ec/Hydronium-3D-balls.png/105px-Hydronium-3D-balls.png" decoding="async" width="105" height="93" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/e/ec/Hydronium-3D-balls.png/158px-Hydronium-3D-balls.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/e/ec/Hydronium-3D-balls.png/210px-Hydronium-3D-balls.png 2x" data-file-width="1100" data-file-height="977" /></a></span></div><div class="thumbcaption">H<sub>3</sub>O<sup>+</sup></div></div></div></div></div> <p>One or both of the protium atoms in water can be substituted with the <a href="/wiki/Isotopes_of_hydrogen" title="Isotopes of hydrogen">isotope</a> <a href="/wiki/Deuterium" title="Deuterium">deuterium</a>, yielding respectively <a href="/wiki/Semiheavy_water" title="Semiheavy water">semiheavy water</a> and <a href="/wiki/Heavy_water" title="Heavy water">heavy water</a>, the latter being one of the most famous deuterium compounds. Due to the high difference in density between deuterium and regular <a href="/wiki/Hydrogen_atom" title="Hydrogen atom">protium</a>, heavy water exhibits many anomalous properties. The radioisotope <a href="/wiki/Tritium" title="Tritium">tritium</a> can also form <a href="/wiki/Tritiated_water" title="Tritiated water">tritiated water</a> in much the same way. Another notable deuterium chalcogenide is <a href="/wiki/Hydrogen_disulfide#Quantum_tunneling_and_its_suppression_in_deuterium_disulfide" title="Hydrogen disulfide">deuterium disulfide</a>. Deuterium telluride (D<sub>2</sub>Te) has slightly higher thermal stability than protium telluride, and has been used experimentally for chemical deposition methods of telluride-based thin films.<sup id="cite_ref-19" class="reference"><a href="#cite_note-19"><span class="cite-bracket">[</span>19<span class="cite-bracket">]</span></a></sup> </p><p>Hydrogen shares many properties with the <a href="/wiki/Halogen" title="Halogen">halogens</a>; substituting the hydrogen with halogens can result in chalcogen halide compounds such as <a href="/wiki/Oxygen_difluoride" title="Oxygen difluoride">oxygen difluoride</a> and <a href="/wiki/Dichlorine_monoxide" title="Dichlorine monoxide">dichlorine monoxide</a>, alongside ones that may be impossible with hydrogen such as <a href="/wiki/Chlorine_dioxide" title="Chlorine dioxide">chlorine dioxide</a>. </p> <div class="mw-heading mw-heading3"><h3 id="Hydrogen_Ions">Hydrogen Ions</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Hydrogen_chalcogenide&action=edit&section=5" title="Edit section: Hydrogen Ions"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>One of the most well-known hydrogen chalcogenide ions is the <a href="/wiki/Hydroxide" title="Hydroxide">hydroxide</a> ion, and the related <a href="/wiki/Hydroxy_group" title="Hydroxy group">hydroxy</a> functional group. The former is present in <a href="/wiki/Alkali_metal" title="Alkali metal">alkali metal</a>, <a href="/wiki/Alkaline_earth" class="mw-redirect" title="Alkaline earth">alkaline earth</a>, and <a href="/wiki/Rare-earth_element" title="Rare-earth element">rare-earth</a> hydroxides, formed by reacting the respective metal with water. The hydroxy group appears commonly in organic chemistry, such as within <a href="/wiki/Alcohol_(chemistry)" title="Alcohol (chemistry)">alcohols</a>. The related <a href="/wiki/Bisulfide" title="Bisulfide">bisulfide</a>/sulfhydryl group appears in <a href="/wiki/Sodium_hydrosulfide" title="Sodium hydrosulfide">hydrosulfide salts</a> and <a href="/wiki/Thiol" title="Thiol">thiols</a>, respectively. </p><p>The <a href="/wiki/Hydronium" title="Hydronium">hydronium</a> (H<sub>3</sub>O<sup>+</sup>) ion is present in aqueous acidic solutions, including the hydrochalcogenic acids themselves, as well as <a href="/wiki/Self-ionization_of_water" title="Self-ionization of water">pure water</a> alongside hydroxide. </p> <div class="mw-heading mw-heading2"><h2 id="References">References</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Hydrogen_chalcogenide&action=edit&section=6" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist"> <div class="mw-references-wrap mw-references-columns"><ol class="references"> <li id="cite_note-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-1">^</a></b></span> <span class="reference-text"><style data-mw-deduplicate="TemplateStyles:r1238218222">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free.id-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited.id-lock-limited a,.mw-parser-output .id-lock-registration.id-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription.id-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/4/4c/Wikisource-logo.svg")right 0.1em center/12px no-repeat}body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-free a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-limited a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-registration a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-subscription a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .cs1-ws-icon a{background-size:contain;padding:0 1em 0 0}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:var(--color-error,#d33)}.mw-parser-output .cs1-visible-error{color:var(--color-error,#d33)}.mw-parser-output .cs1-maint{display:none;color:#085;margin-left:0.3em}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}</style><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.cia.gov/the-world-factbook/countries/world/">"CIA – The world factbook"</a>. <a href="/wiki/Central_Intelligence_Agency" title="Central Intelligence Agency">Central Intelligence Agency</a><span class="reference-accessdate">. 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]"}.mw-parser-output .navbar li{word-spacing:-0.125em}.mw-parser-output .navbar a>span,.mw-parser-output .navbar a>abbr{text-decoration:inherit}.mw-parser-output .navbar-mini abbr{font-variant:small-caps;border-bottom:none;text-decoration:none;cursor:inherit}.mw-parser-output .navbar-ct-full{font-size:114%;margin:0 7em}.mw-parser-output .navbar-ct-mini{font-size:114%;margin:0 4em}html.skin-theme-clientpref-night .mw-parser-output .navbar li a abbr{color:var(--color-base)!important}@media(prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .navbar li a abbr{color:var(--color-base)!important}}@media print{.mw-parser-output .navbar{display:none!important}}</style><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:Hydrides_by_group" title="Template:Hydrides by group"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Hydrides_by_group" title="Template talk:Hydrides by group"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Hydrides_by_group" title="Special:EditPage/Template:Hydrides by group"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Binary_compounds_of_hydrogen" style="font-size:114%;margin:0 4em"><a href="/wiki/Binary_compounds_of_hydrogen" title="Binary compounds of hydrogen">Binary compounds of hydrogen</a></div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Hydride#Ionic_hydrides" title="Hydride">Alkali metal <br />(Group 1) hydrides</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Lithium_hydride" title="Lithium hydride">LiH</a></li> <li><a href="/wiki/Sodium_hydride" title="Sodium hydride">NaH</a></li> <li><a href="/wiki/Potassium_hydride" title="Potassium hydride">KH</a></li> <li><a href="/wiki/Rubidium_hydride" title="Rubidium hydride">RbH</a></li> <li><a href="/wiki/Caesium_hydride" title="Caesium hydride">CsH</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Hydride#Ionic_hydrides" title="Hydride">Alkaline <br />(Group 2) <br />earth hydrides</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th id="Monohydrides" scope="row" class="navbox-group" style="width:1%">Monohydrides</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Beryllium_monohydride" title="Beryllium monohydride">BeH</a></li> <li><a href="/wiki/Magnesium_monohydride" title="Magnesium monohydride">MgH</a></li> <li><a href="/wiki/Calcium_monohydride" title="Calcium monohydride">CaH</a></li> <li><a href="/w/index.php?title=Strontium_monohydride&action=edit&redlink=1" class="new" title="Strontium monohydride (page does not exist)">SrH</a></li> <li><a href="/w/index.php?title=Barium_monohydride&action=edit&redlink=1" class="new" title="Barium monohydride (page does not exist)">BaH</a></li></ul> </div></td></tr></tbody></table><div> </div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th id="Dihydrides" scope="row" class="navbox-group" style="width:1%">Dihydrides</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Beryllium_hydride" title="Beryllium hydride">BeH<sub>2</sub></a></li> <li><a href="/wiki/Magnesium_hydride" title="Magnesium hydride">MgH<sub>2</sub></a></li> <li><a href="/wiki/Calcium_hydride" title="Calcium hydride">CaH<sub>2</sub></a></li> <li><a href="/wiki/Strontium_hydride" title="Strontium hydride">SrH<sub>2</sub></a></li> <li><a href="/wiki/Barium_hydride" title="Barium hydride">BaH<sub>2</sub></a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Group_13_hydride" title="Group 13 hydride">Group 13 <br />hydrides</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th id="Boranes" scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Boranes" title="Boranes">Boranes</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Borane" title="Borane">BH<sub>3</sub></a></li> <li><a href="/wiki/Boron_monohydride" title="Boron monohydride">BH</a></li> <li><a href="/wiki/Diborane" title="Diborane">B<sub>2</sub>H<sub>6</sub></a></li> <li><a href="/wiki/Diborane(2)" title="Diborane(2)">B<sub>2</sub>H<sub>2</sub></a></li> <li><a href="/wiki/Diborane(4)" title="Diborane(4)">B<sub>2</sub>H<sub>4</sub></a></li> <li><a href="/wiki/Tetraborane" title="Tetraborane">B<sub>4</sub>H<sub>10</sub></a></li> <li><a href="/wiki/Pentaborane(9)" title="Pentaborane(9)">B<sub>5</sub>H<sub>9</sub></a></li> <li><a href="/wiki/Pentaborane(11)" title="Pentaborane(11)">B<sub>5</sub>H<sub>11</sub></a></li> <li><a href="/wiki/Hexaborane(10)" title="Hexaborane(10)">B<sub>6</sub>H<sub>10</sub></a></li> <li><a href="/wiki/Hexaborane(12)" title="Hexaborane(12)">B<sub>6</sub>H<sub>12</sub></a></li> <li><a href="/wiki/Decaborane" title="Decaborane">B<sub>10</sub>H<sub>14</sub></a></li> <li><a href="/wiki/Octadecaborane" title="Octadecaborane">B<sub>18</sub>H<sub>22</sub></a></li></ul> </div></td></tr></tbody></table><div> </div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th id="Alanes" scope="row" class="navbox-group" style="width:1%">Alanes</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Aluminium_hydride" title="Aluminium hydride">AlH<sub>3</sub></a></li> <li><a href="/wiki/Dialane" title="Dialane">Al<sub>2</sub>H<sub>6</sub></a></li></ul> </div></td></tr></tbody></table><div> </div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th id="Gallanes" scope="row" class="navbox-group" style="width:1%">Gallanes</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Gallane" title="Gallane">GaH<sub>3</sub></a></li> <li><a href="/wiki/Digallane" title="Digallane">Ga<sub>2</sub>H<sub>6</sub></a></li></ul> </div></td></tr></tbody></table><div> </div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th id="Indiganes" scope="row" class="navbox-group" style="width:1%">Indiganes</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Indium_trihydride" title="Indium trihydride">InH<sub>3</sub></a></li> <li><a href="/w/index.php?title=Diindigane&action=edit&redlink=1" class="new" title="Diindigane (page does not exist)">In<sub>2</sub>H<sub>6</sub></a></li></ul> </div></td></tr></tbody></table><div> </div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th id="Thallanes" scope="row" class="navbox-group" style="width:1%">Thallanes</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Thallane" title="Thallane">TlH<sub>3</sub></a></li> <li><a href="/w/index.php?title=Dithallane&action=edit&redlink=1" class="new" title="Dithallane (page does not exist)">Tl<sub>2</sub>H<sub>6</sub></a></li></ul> </div></td></tr></tbody></table><div> </div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th id="Nihonanes_(predicted)" scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Nihonium" title="Nihonium">Nihonanes</a> (<i>predicted</i>)</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><i>NhH</i></li> <li><i>NhH<sub>3</sub></i></li> <li><i>Nh<sub>2</sub>H<sub>6</sub></i></li> <li><i>NhH<sub>5</sub></i></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Group_14_hydride" title="Group 14 hydride">Group 14 hydrides</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th id="Hydrocarbons" scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Hydrocarbon" title="Hydrocarbon">Hydrocarbons</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Alkane" title="Alkane">alkanes</a></li> <li><a href="/wiki/Alkene" title="Alkene">alkenes</a></li> <li><a href="/wiki/Alkyne" title="Alkyne">alkynes</a></li> <li><a href="/wiki/Cycloalkane" title="Cycloalkane">Cycloalkanes</a></li> <li><a href="/wiki/Cycloalkene" title="Cycloalkene">Cycloalkenes</a></li> <li><a href="/wiki/Cycloalkyne" title="Cycloalkyne">Cycloalkynes</a></li> <li><a href="/wiki/Annulenes" class="mw-redirect" title="Annulenes">Annulenes</a></li></ul> </div></td></tr></tbody></table><div> </div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Methylidyne_radical" title="Methylidyne radical">CH</a></li> <li><a href="/wiki/Methylene_(compound)" title="Methylene (compound)">CH<sub>2</sub></a></li> <li><a href="/wiki/Methyl_radical" title="Methyl radical">CH<sub>3</sub></a></li> <li><a href="/wiki/Ethynyl_radical" title="Ethynyl radical">C<sub>2</sub>H</a></li></ul> </div></td></tr></tbody></table><div> </div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th id="Silanes" scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Silanes" title="Silanes">Silanes</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Silane" title="Silane">SiH<sub>4</sub></a></li> <li><a href="/wiki/Disilane" title="Disilane">Si<sub>2</sub>H<sub>6</sub></a></li> <li><a href="/wiki/Trisilane" title="Trisilane">Si<sub>3</sub>H<sub>8</sub></a></li> <li><a href="/wiki/Tetrasilane" title="Tetrasilane">Si<sub>4</sub>H<sub>10</sub></a></li> <li><a href="/wiki/Pentasilane" class="mw-redirect" title="Pentasilane">Si<sub>5</sub>H<sub>12</sub></a></li> <li><a href="/wiki/Hexasilane" class="mw-redirect" title="Hexasilane">Si<sub>6</sub>H<sub>14</sub></a></li> <li><a href="/w/index.php?title=Heptasilane&action=edit&redlink=1" class="new" title="Heptasilane (page does not exist)">Si<sub>7</sub>H<sub>16</sub></a></li> <li><a href="/w/index.php?title=Octasilane&action=edit&redlink=1" class="new" title="Octasilane (page does not exist)">Si<sub>8</sub>H<sub>18</sub></a></li> <li><a href="/w/index.php?title=Nonasilane&action=edit&redlink=1" class="new" title="Nonasilane (page does not exist)">Si<sub>9</sub>H<sub>20</sub></a></li> <li><a href="/w/index.php?title=Decasilane&action=edit&redlink=1" class="new" title="Decasilane (page does not exist)">Si<sub>10</sub>H<sub>22</sub></a></li> <li><a href="/wiki/Silanes" title="Silanes">more...</a></li></ul> </div></td></tr></tbody></table><div> </div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th id="Silenes" scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Silenes" title="Silenes">Silenes</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Disilene" title="Disilene">Si<sub>2</sub>H<sub>4</sub></a></li></ul> </div></td></tr></tbody></table><div> </div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th id="Silynes" scope="row" class="navbox-group" style="width:1%"><a href="/w/index.php?title=Silynes&action=edit&redlink=1" class="new" title="Silynes (page does not exist)">Silynes</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Disilyne" title="Disilyne">Si<sub>2</sub>H<sub>2</sub></a></li> <li><a href="/wiki/Silicon_monohydride" class="mw-redirect" title="Silicon monohydride">SiH</a></li></ul> </div></td></tr></tbody></table><div> </div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th id="Germanes" scope="row" class="navbox-group" style="width:1%"><a href="/w/index.php?title=Germanes&action=edit&redlink=1" class="new" title="Germanes (page does not exist)">Germanes</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Germane" title="Germane">GeH<sub>4</sub></a></li> <li><a href="/wiki/Digermane" title="Digermane">Ge<sub>2</sub>H<sub>6</sub></a></li> <li><a href="/w/index.php?title=Trigermane&action=edit&redlink=1" class="new" title="Trigermane (page does not exist)">Ge<sub>3</sub>H<sub>8</sub></a></li> <li><a href="/w/index.php?title=Tetragermane&action=edit&redlink=1" class="new" title="Tetragermane (page does not exist)">Ge<sub>4</sub>H<sub>10</sub></a></li> <li><a href="/w/index.php?title=Pentagermane&action=edit&redlink=1" class="new" title="Pentagermane (page does not exist)">Ge<sub>5</sub>H<sub>12</sub></a></li></ul> </div></td></tr></tbody></table><div></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th id="Stannanes" scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Stannanes" class="mw-redirect" title="Stannanes">Stannanes</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Stannane" title="Stannane">SnH<sub>4</sub></a></li> <li><a href="/w/index.php?title=Distannane&action=edit&redlink=1" class="new" title="Distannane (page does not exist)">Sn<sub>2</sub>H<sub>6</sub></a></li></ul> </div></td></tr></tbody></table><div></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th id="Plumbanes" scope="row" class="navbox-group" style="width:1%">Plumbanes</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Plumbane" title="Plumbane">PbH<sub>4</sub></a></li></ul> </div></td></tr></tbody></table><div></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th id="Flerovanes_(predicted)" scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Flerovium" title="Flerovium">Flerovanes</a> (<i>predicted</i>)</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><i>FlH</i></li> <li><i>FlH<sub>2</sub></i></li> <li><i>FlH<sub>4</sub></i></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Pnictogen_hydride" title="Pnictogen hydride">Pnictogen <br />(Group 15) hydrides</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th id="Azanes" scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Azane" title="Azane">Azanes</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Ammonia" title="Ammonia">NH<sub>3</sub></a></li> <li><a href="/wiki/Hydrazine" title="Hydrazine">N<sub>2</sub>H<sub>4</sub></a></li> <li><a href="/wiki/Triazane" title="Triazane">N<sub>3</sub>H<sub>5</sub></a></li> <li><a href="/w/index.php?title=Tetrazane&action=edit&redlink=1" class="new" title="Tetrazane (page does not exist)">N<sub>4</sub>H<sub>6</sub></a></li> <li><a href="/w/index.php?title=Pentazane&action=edit&redlink=1" class="new" title="Pentazane (page does not exist)">N<sub>5</sub>H<sub>7</sub></a></li> <li><a href="/w/index.php?title=Hexazane&action=edit&redlink=1" class="new" title="Hexazane (page does not exist)">N<sub>6</sub>H<sub>8</sub></a></li> <li><a href="/w/index.php?title=Heptazane&action=edit&redlink=1" class="new" title="Heptazane (page does not exist)">N<sub>7</sub>H<sub>9</sub></a></li> <li><a href="/w/index.php?title=Octazane&action=edit&redlink=1" class="new" title="Octazane (page does not exist)">N<sub>8</sub>H<sub>10</sub></a></li> <li><a href="/w/index.php?title=Nonazane&action=edit&redlink=1" class="new" title="Nonazane (page does not exist)">N<sub>9</sub>H<sub>11</sub></a></li> <li><a href="/w/index.php?title=Decazane&action=edit&redlink=1" class="new" title="Decazane (page does not exist)">N<sub>10</sub>H<sub>12</sub></a></li> <li><a href="/wiki/Azane" title="Azane">more...</a></li></ul> </div></td></tr></tbody></table><div> </div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th id="Azenes" scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Azo_compound" title="Azo compound">Azenes</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Diazene" class="mw-redirect" title="Diazene">N<sub>2</sub>H<sub>2</sub></a></li> <li><a href="/wiki/Triazene" title="Triazene">N<sub>3</sub>H<sub>3</sub></a></li> <li><a href="/wiki/Tetrazene" title="Tetrazene">N<sub>4</sub>H<sub>4</sub></a></li></ul> </div></td></tr></tbody></table><div> </div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th id="Phosphanes" scope="row" class="navbox-group" style="width:1%"><a href="/w/index.php?title=Phosphanes&action=edit&redlink=1" class="new" title="Phosphanes (page does not exist)">Phosphanes</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Phosphine" title="Phosphine">PH<sub>3</sub></a></li> <li><a href="/wiki/Diphosphane" title="Diphosphane">P<sub>2</sub>H<sub>4</sub></a></li> <li><a href="/wiki/Triphosphane" title="Triphosphane">P<sub>3</sub>H<sub>5</sub></a></li> <li><a href="/w/index.php?title=Tetraphosphane&action=edit&redlink=1" class="new" title="Tetraphosphane (page does not exist)">P<sub>4</sub>H<sub>6</sub></a></li> <li><a href="/w/index.php?title=Pentaphosphane&action=edit&redlink=1" class="new" title="Pentaphosphane (page does not exist)">P<sub>5</sub>H<sub>7</sub></a></li> <li><a href="/w/index.php?title=Hexaphosphane&action=edit&redlink=1" class="new" title="Hexaphosphane (page does not exist)">P<sub>6</sub>H<sub>8</sub></a></li> <li><a href="/w/index.php?title=Heptaphosphane&action=edit&redlink=1" class="new" title="Heptaphosphane (page does not exist)">P<sub>7</sub>H<sub>9</sub></a></li> <li><a href="/w/index.php?title=Octaphosphane&action=edit&redlink=1" class="new" title="Octaphosphane (page does not exist)">P<sub>8</sub>H<sub>10</sub></a></li> <li><a href="/w/index.php?title=Nonaphosphane&action=edit&redlink=1" class="new" title="Nonaphosphane (page does not exist)">P<sub>9</sub>H<sub>11</sub></a></li> <li><a href="/w/index.php?title=Decaphosphane&action=edit&redlink=1" class="new" title="Decaphosphane (page does not exist)">P<sub>10</sub>H<sub>12</sub></a></li> <li><a href="/w/index.php?title=Phosphanes&action=edit&redlink=1" class="new" title="Phosphanes (page does not exist)">more...</a></li></ul> </div></td></tr></tbody></table><div> </div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th id="Phosphenes" scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Diphosphenes" title="Diphosphenes">Phosphenes</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Diphosphene" title="Diphosphene">P<sub>2</sub>H<sub>2</sub></a></li> <li><a href="/w/index.php?title=Triphosphene&action=edit&redlink=1" class="new" title="Triphosphene (page does not exist)">P<sub>3</sub>H<sub>3</sub></a></li> <li><a href="/w/index.php?title=Tetraphosphene&action=edit&redlink=1" class="new" title="Tetraphosphene (page does not exist)">P<sub>4</sub>H<sub>4</sub></a></li></ul> </div></td></tr></tbody></table><div> </div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th id="Arsanes" scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Arsane" class="mw-redirect" title="Arsane">Arsanes</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Arsine" title="Arsine">AsH<sub>3</sub></a></li> <li><a href="/wiki/Diarsine" class="mw-redirect" title="Diarsine">As<sub>2</sub>H<sub>4</sub></a></li></ul> </div></td></tr></tbody></table><div> </div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th id="Stibanes" scope="row" class="navbox-group" style="width:1%">Stibanes</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Stibine" title="Stibine">SbH<sub>3</sub></a></li></ul> </div></td></tr></tbody></table><div> </div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th id="Bismuthanes" scope="row" class="navbox-group" style="width:1%">Bismuthanes</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Bismuthine" title="Bismuthine">BiH<sub>3</sub></a></li></ul> </div></td></tr></tbody></table><div> </div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th id="Moscovanes" scope="row" class="navbox-group" style="width:1%">Moscovanes</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><i><a href="/wiki/Moscovium" title="Moscovium">McH<sub>3</sub></a></i> (<i>predicted</i>)</li></ul> </div></td></tr></tbody></table><div> <ul><li><a href="/wiki/Hydrazoic_acid" title="Hydrazoic acid">HN<sub>3</sub></a></li> <li><a href="/wiki/Imidogen" title="Imidogen">NH</a></li> <li><a href="/wiki/Pentazole" title="Pentazole">HN<sub>5</sub></a></li> <li><a href="/wiki/Nitrogen_pentahydride" title="Nitrogen pentahydride">NH<sub>5</sub></a> <i>(hypothetical)</i></li></ul></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a class="mw-selflink selflink">Hydrogen <br />chalcogenides <br />(Group 16 hydrides)</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th id="Polyoxidanes" scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Hydrogen_polyoxide" title="Hydrogen polyoxide">Polyoxidanes</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <li><a href="/wiki/Properties_of_water" title="Properties of water">H<sub>2</sub>O</a></li> <li><a href="/wiki/Hydrogen_peroxide" title="Hydrogen peroxide">H<sub>2</sub>O<sub>2</sub></a></li> <li><a href="/wiki/Trioxidane" title="Trioxidane">H<sub>2</sub>O<sub>3</sub></a></li> <li><a href="/wiki/Tetraoxidane" title="Tetraoxidane">H<sub>2</sub>O<sub>4</sub></a></li> <li><a href="/wiki/Pentaoxidane" title="Pentaoxidane">H<sub>2</sub>O<sub>5</sub></a></li> <li><a href="/wiki/Hydrogen_polyoxide" title="Hydrogen polyoxide">more...</a></li> </div></td></tr></tbody></table><div> </div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th id="Polysulfanes" scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Polysulfane" title="Polysulfane">Polysulfanes</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Hydrogen_sulfide" title="Hydrogen sulfide">H<sub>2</sub>S</a></li> <li><a href="/wiki/Hydrogen_disulfide" title="Hydrogen disulfide">H<sub>2</sub>S<sub>2</sub></a></li> <li><a href="/wiki/Trisulfane" title="Trisulfane">H<sub>2</sub>S<sub>3</sub></a></li> <li><a href="/w/index.php?title=Hydrogen_tetrasulfide&action=edit&redlink=1" class="new" title="Hydrogen tetrasulfide (page does not exist)">H<sub>2</sub>S<sub>4</sub></a></li> <li><a href="/w/index.php?title=Hydrogen_pentasulfide&action=edit&redlink=1" class="new" title="Hydrogen pentasulfide (page does not exist)">H<sub>2</sub>S<sub>5</sub></a></li> <li><a href="/w/index.php?title=Hydrogen_hexasulfide&action=edit&redlink=1" class="new" title="Hydrogen hexasulfide (page does not exist)">H<sub>2</sub>S<sub>6</sub></a></li> <li><a href="/w/index.php?title=Hydrogen_heptasulfide&action=edit&redlink=1" class="new" title="Hydrogen heptasulfide (page does not exist)">H<sub>2</sub>S<sub>7</sub></a></li> <li><a href="/w/index.php?title=Hydrogen_octasulfide&action=edit&redlink=1" class="new" title="Hydrogen octasulfide (page does not exist)">H<sub>2</sub>S<sub>8</sub></a></li> <li><a href="/w/index.php?title=Hydrogen_nonasulfide&action=edit&redlink=1" class="new" title="Hydrogen nonasulfide (page does not exist)">H<sub>2</sub>S<sub>9</sub></a></li> <li><a href="/w/index.php?title=Hydrogen_decasulfide&action=edit&redlink=1" class="new" title="Hydrogen decasulfide (page does not exist)">H<sub>2</sub>S<sub>10</sub></a></li> <li><a href="/wiki/Polysulfane" title="Polysulfane">more...</a></li></ul> </div></td></tr></tbody></table><div> </div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th id="Selanes" scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Selanes" class="mw-redirect" title="Selanes">Selanes</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Hydrogen_selenide" title="Hydrogen selenide">H<sub>2</sub>Se</a></li> <li><a href="/wiki/Hydrogen_diselenide" title="Hydrogen diselenide">H<sub>2</sub>Se<sub>2</sub></a></li></ul> </div></td></tr></tbody></table><div> </div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th id="Tellanes" scope="row" class="navbox-group" style="width:1%">Tellanes</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Hydrogen_telluride" title="Hydrogen telluride">H<sub>2</sub>Te</a></li> <li><a href="/wiki/Hydrogen_ditelluride" title="Hydrogen ditelluride">H<sub>2</sub>Te<sub>2</sub></a></li></ul> </div></td></tr></tbody></table><div> </div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th id="Polanes" scope="row" class="navbox-group" style="width:1%">Polanes</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Polonium_hydride" title="Polonium hydride">PoH<sub>2</sub></a></li></ul> </div></td></tr></tbody></table><div> </div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th id="Livermoranes" scope="row" class="navbox-group" style="width:1%">Livermoranes</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><i><a href="/wiki/Livermorium" title="Livermorium">LvH<sub>2</sub></a></i> (<i>predicted</i>)</li></ul> </div></td></tr></tbody></table><div> <ul><li><a href="/wiki/Hydroxyl_radical" title="Hydroxyl radical">HO</a></li> <li><a href="/wiki/Hydroperoxyl" title="Hydroperoxyl">HO<sub>2</sub></a></li> <li><a href="/wiki/Hydrogen_ozonide" title="Hydrogen ozonide">HO<sub>3</sub></a></li> <li><a href="/w/index.php?title=Oxywater&action=edit&redlink=1" class="new" title="Oxywater (page does not exist)">H<sub>2</sub>O<sup>+</sup>–O<sup>–</sup></a> <i>(hypothetical)</i></li> <li><a href="/wiki/Sulfanyl" title="Sulfanyl">HS</a></li> <li><a href="/wiki/Semiheavy_water" title="Semiheavy water">HDO</a></li> <li><a href="/wiki/Heavy_water" title="Heavy water">D<sub>2</sub>O</a></li> <li><a href="/wiki/Tritiated_water" title="Tritiated water">T<sub>2</sub>O</a></li></ul></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Hydrogen_halide" title="Hydrogen halide">Hydrogen halides <br />(Group 17 hydrides)</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <li><a href="/wiki/Hydrogen_fluoride" title="Hydrogen fluoride">HF</a></li> <li><a href="/wiki/Hydrogen_chloride" title="Hydrogen chloride">HCl</a></li> <li><a href="/wiki/Hydrogen_bromide" title="Hydrogen bromide">HBr</a></li> <li><a href="/wiki/Hydrogen_iodide" title="Hydrogen iodide">HI</a></li> <li><a href="/wiki/Hydrogen_astatide" title="Hydrogen astatide">HAt</a></li> <li><i><a href="/wiki/Tennessine" title="Tennessine">HTs</a></i> (<i>predicted</i>)</li> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Transition_metal_hydrides" class="mw-redirect" title="Transition metal hydrides">Transition metal hydrides</a></th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Scandium_hydride" title="Scandium hydride">ScH<sub>2</sub></a></li> <li><a href="/wiki/Yttrium_hydride" title="Yttrium hydride">YH<sub>2</sub></a></li> <li><a href="/w/index.php?title=Yttrium_trihydride&action=edit&redlink=1" class="new" title="Yttrium trihydride (page does not exist)">YH<sub>3</sub></a></li> <li><a href="/w/index.php?title=Yttrium_hexahydride&action=edit&redlink=1" class="new" title="Yttrium hexahydride (page does not exist)">YH<sub>6</sub></a></li> <li><a href="/w/index.php?title=Yttrium_nonahydride&action=edit&redlink=1" class="new" title="Yttrium nonahydride (page does not exist)">YH<sub>9</sub></a></li> <li><a href="/w/index.php?title=Lutetium_dihydride&action=edit&redlink=1" class="new" title="Lutetium dihydride (page does not exist)">LuH<sub>2</sub></a></li> <li><a href="/w/index.php?title=Lutetium_trihydride&action=edit&redlink=1" class="new" title="Lutetium trihydride (page does not exist)">LuH<sub>3</sub></a></li> <li><a href="/wiki/Titanium_hydride" title="Titanium hydride">TiH<sub>2</sub></a></li> <li><a href="/wiki/Titanium(IV)_hydride" title="Titanium(IV) hydride">TiH<sub>4</sub></a></li> <li><a href="/wiki/Zirconium(II)_hydride" title="Zirconium(II) hydride">ZrH<sub>2</sub></a></li> <li><a href="/wiki/Zirconium_hydride" title="Zirconium hydride">ZrH<sub>4</sub></a></li> <li><a href="/w/index.php?title=Hafnium(II)_hydride&action=edit&redlink=1" class="new" title="Hafnium(II) hydride (page does not exist)">HfH<sub>2</sub></a></li> <li><a href="/w/index.php?title=Hafnium_hydride&action=edit&redlink=1" class="new" title="Hafnium hydride (page does not exist)">HfH<sub>4</sub></a></li> <li><a href="/w/index.php?title=Vanadium(I)_hydride&action=edit&redlink=1" class="new" title="Vanadium(I) hydride (page does not exist)">VH</a></li> <li><a href="/w/index.php?title=Vanadium(II)_hydride&action=edit&redlink=1" class="new" title="Vanadium(II) hydride (page does not exist)">VH<sub>2</sub></a></li> <li><a href="/w/index.php?title=Niobium_monohydride&action=edit&redlink=1" class="new" title="Niobium monohydride (page does not exist)">NbH</a></li> <li><a href="/w/index.php?title=Niobium_dihydride&action=edit&redlink=1" class="new" title="Niobium dihydride (page does not exist)">NbH<sub>2</sub></a></li> <li><a href="/w/index.php?title=Tantalum_monohydride&action=edit&redlink=1" class="new" title="Tantalum monohydride (page does not exist)">TaH</a></li> <li><a href="/w/index.php?title=Tantalum_dihydride&action=edit&redlink=1" class="new" title="Tantalum dihydride (page does not exist)">TaH<sub>2</sub></a></li> <li><a href="/wiki/Chromium(I)_hydride" title="Chromium(I) hydride">CrH</a></li> <li><a href="/wiki/Chromium(II)_hydride" title="Chromium(II) hydride">CrH<sub>2</sub></a></li> <li><a href="/wiki/Chromium_hydride" title="Chromium hydride">CrH<sub>x</sub></a></li> <li><a href="/wiki/Iron(I)_hydride" title="Iron(I) hydride">FeH</a></li> <li><a href="/wiki/Iron(II)_hydride" title="Iron(II) hydride">FeH<sub>2</sub></a></li> <li><a href="/wiki/Iron_pentahydride" title="Iron pentahydride">FeH<sub>5</sub></a></li> <li><a href="/wiki/Cobalt(II)_hydride" title="Cobalt(II) hydride">CoH<sub>2</sub></a></li> <li><a href="/w/index.php?title=Rhodium_hydride&action=edit&redlink=1" class="new" title="Rhodium hydride (page does not exist)">RhH<sub>2</sub></a></li> <li><a href="/wiki/Iridium_trihydride" title="Iridium trihydride">IrH<sub>3</sub></a></li> <li><a href="/wiki/Nickel_hydride" title="Nickel hydride">NiH</a></li> <li><a href="/wiki/Palladium_hydride" title="Palladium hydride">PdH<sub><i>x</i></sub> (<i>x</i> < 1)</a></li> <li><a href="/w/index.php?title=Platinum_hydride&action=edit&redlink=1" class="new" title="Platinum hydride (page does not exist)">PtH<sub><i>x</i></sub> (<i>x</i>< 1) </a></li> <li><i><a href="/wiki/Darmstadtium" title="Darmstadtium">DsH<sub>2</sub></a></i> (<i>predicted</i>)</li> <li><a href="/wiki/Copper_hydride" title="Copper hydride">CuH</a></li> <li><i><a href="/wiki/Roentgenium" title="Roentgenium">RgH</a></i> (<i>predicted</i>)</li> <li><a href="/wiki/Zinc_hydride" title="Zinc hydride">ZnH<sub>2</sub></a></li> <li><a href="/wiki/Cadmium_hydride" title="Cadmium hydride">CdH<sub>2</sub></a></li> <li><a href="/wiki/Mercury(I)_hydride" title="Mercury(I) hydride">HgH</a></li> <li><a href="/wiki/Mercury(I)_hydride" title="Mercury(I) hydride">Hg<sub>2</sub>H<sub>2</sub></a></li> <li><a href="/wiki/Mercury(II)_hydride" title="Mercury(II) hydride">HgH<sub>2</sub></a></li> <li><i><a href="/wiki/Copernicium" title="Copernicium">CnH<sub>2</sub></a></i> (<i>predicted</i>)</li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/w/index.php?title=Lanthanide_hydrides&action=edit&redlink=1" class="new" title="Lanthanide hydrides (page does not exist)">Lanthanide hydrides</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/w/index.php?title=Lanthanum_dihydride&action=edit&redlink=1" class="new" title="Lanthanum dihydride (page does not exist)">LaH<sub>2</sub></a></li> <li><a href="/w/index.php?title=Lanthanum_trihydride&action=edit&redlink=1" class="new" title="Lanthanum trihydride (page does not exist)">LaH<sub>3</sub></a></li> <li><a href="/wiki/Lanthanum_decahydride" title="Lanthanum decahydride">LaH<sub>10</sub></a></li> <li><a href="/w/index.php?title=Cerium_dihydride&action=edit&redlink=1" class="new" title="Cerium dihydride (page does not exist)">CeH<sub>2</sub></a></li> <li><a href="/w/index.php?title=Cerium_trihydride&action=edit&redlink=1" class="new" title="Cerium trihydride (page does not exist)">CeH<sub>3</sub></a></li> <li><a href="/w/index.php?title=Praseodymium_dihydride&action=edit&redlink=1" class="new" title="Praseodymium dihydride (page does not exist)">PrH<sub>2</sub></a></li> <li><a href="/w/index.php?title=Praseodymium_hydride&action=edit&redlink=1" class="new" title="Praseodymium hydride (page does not exist)">PrH<sub>3</sub></a></li> <li><a href="/wiki/Neodymium(II)_hydride" title="Neodymium(II) hydride">NdH<sub>2</sub></a></li> <li><a href="/wiki/Neodymium(III)_hydride" title="Neodymium(III) hydride">NdH<sub>3</sub></a></li> <li><a href="/w/index.php?title=Samarium_dihydride&action=edit&redlink=1" class="new" title="Samarium dihydride (page does not exist)">SmH<sub>2</sub></a></li> <li><a href="/w/index.php?title=Samarium_trihydride&action=edit&redlink=1" class="new" title="Samarium trihydride (page does not exist)">SmH<sub>3</sub></a></li> <li><a href="/wiki/Europium_hydride" title="Europium hydride">EuH<sub>2</sub></a></li> <li><a href="/w/index.php?title=Gadolinium_dihydride&action=edit&redlink=1" class="new" title="Gadolinium dihydride (page does not exist)">GdH<sub>2</sub></a></li> <li><a href="/w/index.php?title=Gadolinium_trihydride&action=edit&redlink=1" class="new" title="Gadolinium trihydride (page does not exist)">GdH<sub>3</sub></a></li> <li><a href="/w/index.php?title=Terbium_dihydride&action=edit&redlink=1" class="new" title="Terbium dihydride (page does not exist)">TbH<sub>2</sub></a></li> <li><a href="/w/index.php?title=Terbium_trihydride&action=edit&redlink=1" class="new" title="Terbium trihydride (page does not exist)">TbH<sub>3</sub></a></li> <li><a href="/w/index.php?title=Dysprosium_dihydride&action=edit&redlink=1" class="new" title="Dysprosium dihydride (page does not exist)">DyH<sub>2</sub></a></li> <li><a href="/w/index.php?title=Dysprosium_trihydride&action=edit&redlink=1" class="new" title="Dysprosium trihydride (page does not exist)">DyH<sub>3</sub></a></li> <li><a href="/w/index.php?title=Holmium_dihydride&action=edit&redlink=1" class="new" title="Holmium dihydride (page does not exist)">HoH<sub>2</sub></a></li> <li><a href="/w/index.php?title=Holmium_trihydride&action=edit&redlink=1" class="new" title="Holmium trihydride (page does not exist)">HoH<sub>3</sub></a></li> <li><a href="/w/index.php?title=Erbium_dihydride&action=edit&redlink=1" class="new" title="Erbium dihydride (page does not exist)">ErH<sub>2</sub></a></li> <li><a href="/w/index.php?title=Erbium_trihydride&action=edit&redlink=1" class="new" title="Erbium trihydride (page does not exist)">ErH<sub>3</sub></a></li> <li><a href="/w/index.php?title=Thulium_dihydride&action=edit&redlink=1" class="new" title="Thulium dihydride (page does not exist)">TmH<sub>2</sub></a></li> <li><a href="/w/index.php?title=Thulium_trihydride&action=edit&redlink=1" class="new" title="Thulium trihydride (page does not exist)">TmH<sub>3</sub></a></li> <li><a href="/wiki/Ytterbium(II)_hydride" title="Ytterbium(II) hydride">YbH<sub>2</sub></a></li> <li><a href="/w/index.php?title=Lutetium_dihydride&action=edit&redlink=1" class="new" title="Lutetium dihydride (page does not exist)">LuH<sub>2</sub></a></li> <li><a href="/w/index.php?title=Lutetium_trihydride&action=edit&redlink=1" class="new" title="Lutetium trihydride (page does not exist)">LuH<sub>3</sub></a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/w/index.php?title=Actinide_hydrides&action=edit&redlink=1" class="new" title="Actinide hydrides (page does not exist)">Actinide hydrides</a></th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/w/index.php?title=Actinium_dihydride&action=edit&redlink=1" class="new" title="Actinium dihydride (page does not exist)">AcH<sub>2</sub></a></li> <li><a href="/w/index.php?title=Thorium_hydride&action=edit&redlink=1" class="new" title="Thorium hydride (page does not exist)">ThH<sub>2</sub></a></li> <li><a href="/w/index.php?title=Thorium(IV)_hydride&action=edit&redlink=1" class="new" title="Thorium(IV) hydride (page does not exist)">ThH<sub>4</sub></a></li> <li>Th<sub>4</sub>H<sub>15</sub></li> <li><a href="/wiki/Protactinium_trihydride" title="Protactinium trihydride">PaH<sub>3</sub></a></li> <li><a href="/wiki/Uranium(III)_hydride" title="Uranium(III) hydride">UH<sub>3</sub></a></li> <li><a href="/wiki/Uranium(IV)_hydride" title="Uranium(IV) hydride">UH<sub>4</sub></a></li> <li><a href="/w/index.php?title=Neptunium_dihydride&action=edit&redlink=1" class="new" title="Neptunium dihydride (page does not exist)">NpH<sub>2</sub></a></li> <li><a href="/w/index.php?title=Neptunium_trihydride&action=edit&redlink=1" class="new" title="Neptunium trihydride (page does not exist)">NpH<sub>3</sub></a></li> <li><a href="/wiki/Plutonium_hydride" title="Plutonium hydride">PuH<sub>2</sub></a></li> <li><a href="/wiki/Plutonium_hydride" title="Plutonium hydride">PuH<sub>3</sub></a></li> <li><a href="/w/index.php?title=Americium_dihydride&action=edit&redlink=1" class="new" title="Americium dihydride (page does not exist)">AmH<sub>2</sub></a></li> <li><a href="/wiki/Americium_trihydride" title="Americium trihydride">AmH<sub>3</sub></a></li> <li><a href="/w/index.php?title=Curium_hydride&action=edit&redlink=1" class="new" title="Curium hydride (page does not exist)">CmH<sub>2</sub></a></li> <li><a href="/w/index.php?title=Berkelium_dihydride&action=edit&redlink=1" class="new" title="Berkelium dihydride (page does not exist)">BkH<sub>2</sub></a></li> <li><a href="/w/index.php?title=Berkelium_trihydride&action=edit&redlink=1" class="new" title="Berkelium trihydride (page does not exist)">BkH<sub>3</sub></a></li> <li><a href="/w/index.php?title=Californium_dihydride&action=edit&redlink=1" class="new" title="Californium dihydride (page does not exist)">CfH<sub>2</sub></a></li> <li><a href="/w/index.php?title=Californium_trihydride&action=edit&redlink=1" class="new" title="Californium trihydride (page does not exist)">CfH<sub>3</sub></a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Exotic_atoms" class="mw-redirect" title="Exotic atoms">Exotic matter hydrides</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Positronium_hydride" title="Positronium hydride">PsH</a></li></ul> </div></td></tr></tbody></table></div>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?type=1x1" alt="" width="1" height="1" style="border: none; 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