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href="https://www.twitter.com/AmericanElement"><span class="sr-only">Twitter</span></a> <a class="ming-link social facebook" href="https://www.facebook.com/AmericanElement"><span class="sr-only">Facebook</span></a> <a class="ming-link social linkedin" href="https://www.linkedin.com/company/american-elements"><span class="sr-only">LinkedIn</span></a> <a class="ming-link social instagram" href="https://www.instagram.com/americanelements/"><span class="sr-only">Instagram</span></a></div></div></div></div></div><div class="container-fluid" id="main-content"> <div id="page-content">   <div class="banner">  <h1 class="medium">Promethium</h1> <span class="element-item2 lanthanoid metal inner-transition" aria-hidden="true"><span class="symbol2">Pm</span><span class="number">61</span><span class="weight">145</span></span>  </div>   <div id="element-tabs"> <ul class="nav nav-pills nav-justified" role="tablist"> <li class="active"><a href="#about" id="tab1" role="tab" aria-controls="about" data-toggle="pill" class="InfoTab" tabindex="0">About Promethium</a></li> <li><a href="#properties" id="tab2" role="tab" aria-controls="properties" data-toggle="pill" class="InfoTab" tabindex="0">Properties</a></li> <li><a href="#isotopes" id="tab3" role="tab" aria-controls="isotopes" data-toggle="pill" class="InfoTab" tabindex="0">Isotopes</a></li> </ul> </div>  <div id="content"> <div class="tab-content"> <div class="tab-pane active" id="about" role="tabpanel" aria-labelledby="tab1"> <h2>About Promethium</h2> <img src="images_graphics/element-bohr-models/promethium-bohr-model.jpg" alt="Promethium Bohr" width="200" height="200" class="image-left" /> <p>All of promethium鈥檚 isotopes are radioactive and have short half-lives, so appreciable amounts are not found in natural sources. The existence of an unknown element with atomic number 61 was predicted in 1914 by Henry Mosley, but the metal was not successfully produced and fully characterized until 1945. This was accomplished by Jacob A. Marinsky, Lawrence E. Glendenin, and Charles D. Coryell at Oak Ridge National Laboratory by separating and analyzing fission products of <a href="uu.htm">uranium</a>. The name was derived from the Titan in Greek mythology who stole fire from Mount Olympus to give to humans, Prometheus. Since the element can only be obtained from a lab, it has few applications. The only isotope of promethium used outside of research is promethium-147, which is produced and used in very small (milligram) quantities in atomic batteries and signal lights containing <a href="optical-materials.html">phosphors</a> that emit light in response to absorption of radiation emitted by the isotope. Since this relatively stable isotope emits x-rays, it could theoretically be used for portable x-ray sources.</p> </div> <div class="tab-pane" id="properties" role="tabpanel" aria-labelledby="tab2"> <h2>Promethium Properties</h2> <p><img src="promethium-bohr.jpg" alt="Promethium Bohr Model" width="200" height="200" class="image-left" /><strong>Promethium</strong> is a Block F, Group 3, Period 6 element. The number of electrons in each of Promethium's shells is 2, 8, 18, 23, 8, 2 and its electron configuration is [Xe] 4f<sup>5</sup> 6s<sup>2</sup>. The promethium atom has a radius of 183.pm and its Van der Waals radius is 236.pm. In its elemental form, CAS 7440-12-2, promethium has a metallic appearance. Promethium was discovered by Chien Shiung Wu, Emilio Segr猫, and Hans Bethe in 1942. It was first isolated by J. A. Marinsky, Lawrence Glendenin and Charles D. Coryell in 1945. The element name comes from Greek mythology after the titan, Prometheus, who stole the fire of Zeus and gave it to mankind.</p> <p>Promethium is radioactive. Promethium information, including technical data, properties, and other useful facts are specified below. Scientific facts such as the atomic structure, ionization energy, abundance on Earth, conductivity, and thermal properties are included. </p> <div id="table-wrapper"> <div class="panel-group expanding" id="accordion2"> <div class="panel panel-default properties-panel"> <div class="panel-heading active-collapsible"> <a data-toggle="collapse" class="activate-panel" href="#general-properties">General Properties<span class="Arrowhead-Down-24 dropdown-icon"></span></a> </div> <div class="panel-collapse collapse" id="general-properties"> <table class="table properties-table" > <tr> <th id="symbol">Symbol:</th> <td>Pm</td> </tr> <tr> <th id="atomic-number">Atomic Number:</th> <td>61</td> </tr> <tr> <th id="atomic-weight">Atomic Weight:</th> <td>145</td> </tr> <tr> <th id="element-category">Element Category:</th> <td>Lanthanide</td> </tr> <tr> <th id="group-period-block">Group, Period, Block:</th> <td>n/a, 6, f</td> </tr> <tr> <th id="color">Color:</th> <td>silvery-white/ metallic</td> </tr> <tr> <th id="other-names">Other Names:</th> <td>Prometio, Prom茅cio</td> </tr> </table> </div> </div> <div class="panel panel-default properties-panel"> <div class="panel-heading active-collapsible"> <a data-toggle="collapse" class="activate-panel" href="#physical-properties">Physical Properties<span class="Arrowhead-Down-24 dropdown-icon"></span></a> </div> <div id="physical-properties" class="panel-collapse collapse"> <table class="properties-table table"> <tr> <th id="melting-point">Melting Point:</th> <td>1042°C, 1907.6°F, 1315.15 K</td> </tr> <tr> <th id="boiling-point">Boiling Point:</th> <td>3000°C, 5432°F, 3273.15 K</td> </tr> <tr> <th id="density">Density:</th> <td>7.26 g路cm<sup>3</sup></td> </tr> <tr> <th id="liquid-density">Liquid Density @ Melting Point:</th> <td>N/A</td> </tr> <tr> <th id="density-20-degrees-C">Density @ 20°C:</th> <td>7.220 g/cm<sup>3</sup></td> </tr> <tr> <th id="solid-density">Density of Solid:</th> <td>7264 kg·m<sup>3</sup></td> </tr> <tr> <th id="specific-heat">Specific Heat:</th> <td>N/A</td> </tr> <tr> <th id="superconductivity-temperature">Superconductivity Temperature:</th> <td>N/A</td> </tr> <tr> <th id="triple-point">Triple Point:</th> <td>N/A</td> </tr> <tr> <th id="critical-point">Critical Point:</th> <td>N/A</td> </tr> <tr> <th id="fusion-heat">Heat of Fusion (kJ·mol<sup>-1</sup>):</th> <td>about 7.7</td> </tr> <tr> <th id="vaporization-heat">Heat of Vaporization (kJ·mol<sup>-1</sup>):</th> <td>290</td> </tr> <tr> <th id="atomization-heat">Heat of Atomization (kJ·mol<sup>-1</sup>):</th> <td>about 350</td> </tr> <tr> <th id="thermal-conductivity">Thermal Conductivity:</th> <td>17.9 W路m<sup>-1</sup>路K<sup>-1</sup></td> </tr> <tr> <th id="thermal-expansion">Thermal Expansion:</th> <td>(r.t.) ( poly) est. 11 碌m/(m路K)</td> </tr> <tr> <th id="electrical-resistivity">Electrical Resistivity:</th> <td>(r.t.) est. 0.75 nΩ路m</td> </tr> <tr> <th id="tensile-strength">Tensile Strength:</th> <td>N/A</td> </tr> <tr> <th id="molar-heat-capacity">Molar Heat Capacity:</th> <td>N/A</td> </tr> <tr> <th id="youngs-modulus">Young's Modulus:</th> <td>(form) est. 46 GPa</td> </tr> <tr> <th id="shear-modulus">Shear Modulus:</th> <td>( form) est. 18 GPa</td> </tr> <tr> <th id="bulk-modulus">Bulk Modulus:</th> <td>( form) est. 33 GPa</td> </tr> <tr> <th id="poisson-ratio">Poisson Ratio:</th> <td>( form) est. 0.28</td> </tr> <tr> <th id="mohs-hardness">Mohs Hardness:</th> <td>N/A</td> </tr> <tr> <th id="vickers-hardness">Vickers Hardness:</th> <td>N/A</td> </tr> <tr> <th id="brinell-hardness">Brinell Hardness:</th> <td>N/A</td> </tr> <tr> <th id="speed-of-sound">Speed of Sound:</th> <td>N/A</td> </tr> <tr> <th id="pauling-electronegativity">Pauling Electronegativity:</th> <td>N/A</td> </tr> <tr> <th id="sanderson-electronegativity">Sanderson Electronegativity:</th> <td>N/A</td> </tr> <tr> <th id="allerd-rochow-electronegativity">Allred Rochow Electronegativity:</th> <td>1.07</td> </tr> <tr> <th id="mulliken-jaffe-electronegativity">Mulliken-Jaffe Electronegativity:</th> <td>N/A</td> </tr> <tr> <th id="allen-electronegativity">Allen Electronegativity:</th> <td>N/A</td> </tr> <tr> <th id="pauling-electropositivity">Pauling Electropositivity:</th> <td>N/A</td> </tr> <tr> <th id="reflectivity">Reflectivity (%):</th> <td>N/A</td> </tr> <tr> <th id="refractive-index">Refractive Index:</th> <td>N/A</td> </tr> </table> </div> </div> <div class="panel panel-default properties-panel"> <div class="panel-heading active-collapsible"> <a data-toggle="collapse" class="activate-panel" href="#chemical-properties">Chemical Properties<span class="Arrowhead-Down-24 dropdown-icon"></span></a> </div> <div id="chemical-properties" class="panel-collapse collapse"> <table class="properties-table table"> <tr> <th id="electrons">Electrons:</th> <td>61</td> </tr> <tr> <th id="protons">Protons:</th> <td>61</td> </tr> <tr> <th id="neutrons">Neutrons:</th> <td>84</td> </tr> <tr> <th id="electron-configuration">Electron Configuration:</th> <td>[Xe] 4f<sup>5</sup> 6s<sup>2</sup></td> </tr> <tr> <th id="atomic-radius">Atomic Radius:</th> <td>183 pm</td> </tr> <tr> <th id="atomic-radius-non-bonded">Atomic Radius,<br /> non-bonded (Å):</th> <td>2.38</td> </tr> <tr> <th id="covalent-radius">Covalent Radius:</th> <td>199 pm</td> </tr> <tr> <th id="covalent-radius-non-bonded">Covalent Radius (Å):</th> <td>1.86</td> </tr> <tr> <th id="van-der-waals-radius">Van der Waals Radius:</th> <td>236 pm</td> </tr> <tr> <th id="oxidation-states">Oxidation States:</th> <td>3 (mildly basic oxide)</td> </tr> <tr> <th id="phase">Phase:</th> <td>Solid</td> </tr> <tr> <th id="crystal-structure">Crystal Structure:</th> <td>hexagonal</td> </tr> <tr> <th id="magnetic-ordering">Magnetic Ordering:</th> <td>paramagnetic</td> </tr> <tr> <th id="electron-affinity">Electron Affinity (kJ·mol<sup>-1</sup>)</th> <td>Unknown</td> </tr> <tr> <th id="1-ionization">1<sup>st</sup> Ionization Energy:</th> <td>538.39 kJ路mol<sup>-1</sup></td> </tr> <tr> <th id="2-ionization">2<sup>nd</sup> Ionization Energy:</th> <td>1051.70 kJ路mol<sup>-1</sup></td> </tr> <tr> <th id="3-ionization">3<sup>rd</sup> Ionization Energy:</th> <td>2151.64 kJ路mol<sup>-1</sup></td> </tr> </table> </div> </div> </div> <div class="panel-group expanding" id="accordion3"> <div class="panel panel-default properties-panel"> <div class="panel-heading active-collapsible"> <a data-toggle="collapse" class="activate-panel" href="#identifiers">Identifiers<span class="Arrowhead-Down-24 dropdown-icon"></span></a> </div> <div class="panel-collapse collapse" id="identifiers"> <table class="table properties-table" > <tr> <th id="cas-number">CAS Number:</th> <td>7440-12-2</td> </tr> <tr> <th id="ec-number">EC Number:</th> <td>N/A</td> </tr> <tr> <th id="mdl-number">MDL Number:</th> <td>N/A</td> </tr> <tr> <th id="beilstein-number">Beilstein Number:</th> <td>N/A</td> </tr> <tr> <th id="smile-id">SMILES Identifier:</th> <td>[Pm]</td> </tr> <tr> <th id="inchi-id">InChI Identifier:</th> <td>InChI=1S/Pm</td> </tr> <tr> <th id="inchi-key">InChI Key:</th> <td>VQMWBBYLQSCNPO-UHFFFAOYSA-N</td> </tr> <tr> <th id="pubchem-cid">PubChem CID:</th> <td>23944</td> </tr> <tr> <th id="chemspider-id">ChemSpider ID:</th> <td>22386</td> </tr> </table> </div> </div> <div class="panel panel-default properties-panel"> <div class="panel-heading active-collapsible"> <a data-toggle="collapse" class="activate-panel" href="#abundance">Abundance<span class="Arrowhead-Down-24 dropdown-icon"></span></a> </div> <div class="panel-collapse collapse" id="abundance"> <table class="table properties-table" > <tr> <th class="abundance" id="earth-total">Earth - Total:</th> <td>N/A</td> </tr> <tr> <th class="abundance" id="mercury-total">Mercury - Total:</th> <td>N/A</td> </tr> <tr> <th class="abundance" id="venus-total">Venus - Total:</th> <td>N/A</td> </tr> <tr> <th class="abundance" id="abundance-earth-seawater-weight">Earth聽-聽Seawater (Oceans), ppb by weight:</th> <td>N/A</td> </tr> <tr> <th class="abundance" id="abundance-earth-seawater-atoms">Earth聽-聽Seawater (Oceans), ppb by atoms:</th> <td>N/A</td> </tr> <tr> <th class="abundance" id="abundance-earth-crust-weight">Earth聽-聽 Crust (Crustal Rocks), ppb by weight:</th> <td>N/A</td> </tr> <tr> <th class="abundance" id="abundance-earth-crust-atoms">Earth聽-聽 Crust (Crustal Rocks), ppb by atoms:</th> <td>N/A</td> </tr> <tr> <th class="abundance" id="abundance-sun-weight">Sun - Total, ppb by weight:</th> <td>N/A</td> </tr> <tr> <th class="abundance" id="abundance-sun-atoms">Sun - Total, ppb by atoms:</th> <td>N/A</td> </tr> <tr> <th class="abundance" id="abundance-stream-weight">Stream, ppb by weight:</th> <td>N/A</td> </tr> <tr> <th class="abundance" id="abundance-stream-atoms">Stream, ppb by atoms:</th> <td>N/A</td> </tr> <tr> <th class="abundance" id="abundance-meterorite-carbonaceous-weight">Meterorite (Carbonaceous), ppb by weight:</th> <td>N/A</td> </tr> <tr> <th class="abundance" id="abundance-meterorite-carbonaceous-atoms">Meterorite (Carbonaceous), ppb by atoms:</th> <td>N/A</td> </tr> <tr> <th class="abundance" id="abundance-human-body-weight">Typical Human Body, ppb by weight:</th> <td>N/A</td> </tr> <tr> <th class="abundance" id="abundance-human-body-atoms">Typical Human Body, ppb by atom:</th> <td>N/A</td> </tr> <tr> <th class="abundance" id="abundance-universe-weight">Universe, ppb by weight:</th> <td>N/A</td> </tr> <tr> <th class="abundance" id="abundance-universe-atoms">Universe, ppb by atom:</th> <td>N/A</td> </tr> </table> </div> </div> <div class="panel panel-default properties-panel"> <div class="panel-heading active-collapsible"> <a data-toggle="collapse" class="activate-panel" href="#history">History<span class="Arrowhead-Down-24 dropdown-icon"></span></a> </div> <div class="panel-collapse collapse" id="history"> <table class="table properties-table" > <tr> <th id="discovered">Discovered By:</th> <td>Chien Shiung Wu, Emilio Segr猫, Hans Bethe</td> </tr> <tr> <th id="discovery-date">Discovery Date:</th> <td>1942</td> </tr> <tr> <th id="first-isolation">First Isolation:</th> <td>Charles D. Coryell, Jacob A. Marinsky, Lawrence E. Glendenin, Harold G. Richter (1945)</td> </tr> </table> </div> </div> </div> </div> </div> <div class="tab-pane" id="isotopes" role="tabpanel" aria-labelledby="tab3"> <h2>Promethium Isotopes</h2> <p>Promethium (Pm) does not exist in nature (except in trace quantities from spontaneous fission and alpha decay of <sup>151</sup>Eu). It has no stable isotopes.</p> <table class="isotopes-table"> <tr> <th scope="col" id="nuclide">Nuclide</th> <th scope="col" id="mass">Isotopic Mass</th> <th scope="col" id="half-life">Half-Life</th> <th scope="col" id="decay">Mode of Decay</th> <th scope="col" id="nuclear-spin">Nuclear Spin</th> <th scope="col" id="magnetic-moment">Magnetic Moment</th> <th scope="col" id="binding-energy">Binding Energy (MeV)</th> <th scope="col" id="natural-abundance">Natural Abundance<br /> (% by atom)</th> </tr> <tr> <th scope="row"><sup>126</sup>Pm</th><td>125.95752(54)#</td><td>0.5# s</td><td>Unknown</td><td>N/A</td><td>N/A</td><td>996.05</td><td>-</td></tr> <tr> <th scope="row"><sup>127</sup>Pm</th><td>126.95163(64)#</td><td>1# s</td><td>Unknown</td><td>5/2+#</td><td>N/A</td><td>1004.13</td><td>-</td></tr> <tr> <th scope="row"><sup>128</sup>Pm</th><td>127.94842(43)#</td><td>1.0(3) s</td><td>脽<sup>+</sup>聽to <sup>128</sup>Nd; p to <sup>127</sup>Nd</td><td>6+#</td><td>N/A</td><td>1021.53</td><td>-</td></tr> <tr> <th scope="row"><sup>129</sup>Pm</th><td>128.94316(43)#</td><td>3# s [>200 ns]</td><td>脽<sup>+</sup>聽to <sup>129</sup>Nd</td><td>5/2+#</td><td>N/A</td><td>1029.61</td><td>-</td></tr> <tr> <th scope="row"><sup>130</sup>Pm</th><td>129.94045(32)#</td><td>2.6(2) s</td><td>脽<sup>+</sup>聽to <sup>130</sup>Nd; 脽<sup>+</sup> + p聽to <sup>129</sup>Pr</td><td>(5+,6+,4+)</td><td>N/A</td><td>1037.68</td><td>-</td></tr> <tr> <th scope="row"><sup>131</sup>Pm</th><td>130.93587(21)#</td><td>6.3(8) s</td><td>脽<sup>+</sup> + p聽to <sup>130</sup>Pr; 脽<sup>+</sup>聽to <sup>131</sup>Nd</td><td>5/2+#</td><td>N/A</td><td>1055.08</td><td>-</td></tr> <tr> <th scope="row"><sup>132</sup>Pm</th><td>131.93375(21)#</td><td>6.2(6) s</td><td>脽<sup>+</sup>聽to <sup>132</sup>Nd; 脽<sup>+</sup> + p聽to <sup>131</sup>Pr</td><td>(3+)</td><td>N/A</td><td>1063.16</td><td>-</td></tr> <tr> <th scope="row"><sup>133</sup>Pm</th><td>132.92978(5)</td><td>15(3) s</td><td>脽<sup>+</sup>聽to <sup>133</sup>Nd</td><td>(3/2+)</td><td>N/A</td><td>1080.55</td><td>-</td></tr> <tr> <th scope="row"><sup>134</sup>Pm</th><td>133.92835(6)</td><td>22(1) s</td><td>脽<sup>+</sup>聽to <sup>134</sup>Nd</td><td>(5+)</td><td>N/A</td><td>1088.63</td><td>-</td></tr> <tr> <th scope="row"><sup>135</sup>Pm</th><td>134.92488(6)</td><td>49(3) s</td><td>脽<sup>+</sup>聽to <sup>135</sup>Nd</td><td>(5/2+,3/2+)</td><td>N/A</td><td>1096.71</td><td>-</td></tr> <tr> <th scope="row"><sup>136</sup>Pm</th><td>135.92357(8)</td><td>107(6) s</td><td>脽<sup>+</sup>聽to <sup>136</sup>Nd</td><td>(5-)</td><td>N/A</td><td>1104.79</td><td>-</td></tr> <tr> <th scope="row"><sup>137</sup>Pm</th><td>136.920479(14)</td><td>2# min</td><td>脽<sup>+</sup>聽to <sup>137</sup>Nd</td><td>5/2+#</td><td>N/A</td><td>1112.87</td><td>-</td></tr> <tr> <th scope="row"><sup>138</sup>Pm</th><td>137.919548(30)</td><td>10(2) s</td><td>脽<sup>+</sup>聽to <sup>138</sup>Nd</td><td>1+#</td><td>N/A</td><td>1130.26</td><td>-</td></tr> <tr> <th scope="row"><sup>139</sup>Pm</th><td>138.916804(14)</td><td>4.15(5) min</td><td>脽<sup>+</sup>聽to <sup>139</sup>Nd</td><td>(5/2)+</td><td>N/A</td><td>1138.34</td><td>-</td></tr> <tr> <th scope="row"><sup>140</sup>Pm</th><td>139.91604(4)</td><td>9.2(2) s</td><td>脽<sup>+</sup>聽to <sup>140</sup>Nd</td><td>1+</td><td>N/A</td><td>1146.42</td><td>-</td></tr> <tr> <th scope="row"><sup>141</sup>Pm</th><td>140.913555(15)</td><td>20.90(5) min</td><td>脽<sup>+</sup>聽to <sup>141</sup>Nd</td><td>5/2+</td><td>N/A</td><td>1154.5</td><td>-</td></tr> <tr> <th scope="row"><sup>142</sup>Pm</th><td>141.912874(27)</td><td>40.5(5) s</td><td>脽<sup>+</sup>聽to <sup>142</sup>Nd</td><td>1+</td><td>N/A</td><td>1162.58</td><td>-</td></tr> <tr> <th scope="row"><sup>143</sup>Pm</th><td>142.910933(4)</td><td>265(7) d</td><td>EC to <sup>143</sup>Nd</td><td>5/2+</td><td>3.8</td><td>1170.66</td><td>-</td></tr> <tr> <th scope="row"><sup>144</sup>Pm</th><td>143.912591(3)</td><td>363(14) d</td><td>EC to <sup>144</sup>Nd</td><td>5-</td><td>1.7</td><td>1178.73</td><td>-</td></tr> <tr> <th scope="row"><sup>145</sup>Pm</th><td>144.912749(3)</td><td>17.7(4) y</td><td>EC to <sup>145</sup>Nd; a to <sup>141</sup>Pr</td><td>5/2+</td><td>N/A</td><td>1186.81</td><td>-</td></tr> <tr> <th scope="row"><sup>146</sup>Pm</th><td>145.914696(5)</td><td>5.53(5) y</td><td>EC to <sup>146</sup>Nd; 脽<sup>-</sup>聽to <sup>146</sup>Sm</td><td>3-</td><td>N/A</td><td>1194.89</td><td>-</td></tr> <tr> <th scope="row"><sup>147</sup>Pm</th><td>146.9151385(26)</td><td>2.6234(2) y</td><td>脽<sup>-</sup>聽to <sup>147</sup>Sm</td><td>7/2+</td><td>2.6</td><td>1202.97</td><td>-</td></tr> <tr> <th scope="row"><sup>148</sup>Pm</th><td>147.917475(7)</td><td>5.368(2) d</td><td>脽<sup>-</sup>聽to <sup>148</sup>Sm</td><td>1-</td><td>2</td><td>1211.05</td><td>-</td></tr> <tr> <th scope="row"><sup>149</sup>Pm</th><td>148.918334(4)</td><td>53.08(5) h</td><td>脽<sup>-</sup>聽to <sup>149</sup>Sm</td><td>7/2+</td><td>3.3</td><td>1219.13</td><td>-</td></tr> <tr> <th scope="row"><sup>150</sup>Pm</th><td>149.920984(22)</td><td>2.68(2) h</td><td>脽<sup>-</sup>聽to <sup>150</sup>Sm</td><td>(1-)</td><td>N/A</td><td>1217.89</td><td>-</td></tr> <tr> <th scope="row"><sup>151</sup>Pm</th><td>150.921207(6)</td><td>28.40(4) h</td><td>脽<sup>-</sup>聽to <sup>151</sup>Sm</td><td>5/2+</td><td>1.8</td><td>1225.97</td><td>-</td></tr> <tr> <th scope="row"><sup>152</sup>Pm</th><td>151.923497(28)</td><td>4.12(8) min</td><td>脽<sup>-</sup>聽to <sup>152</sup>Sm</td><td>1+</td><td>N/A</td><td>1234.05</td><td>-</td></tr> <tr> <th scope="row"><sup>153</sup>Pm</th><td>152.924117(12)</td><td>5.25(2) min</td><td>脽<sup>-</sup>聽to <sup>153</sup>Sm</td><td>5/2-</td><td>N/A</td><td>1242.13</td><td>-</td></tr> <tr> <th scope="row"><sup>154</sup>Pm</th><td>153.92646(5)</td><td>1.73(10) min</td><td>脽<sup>-</sup>聽to <sup>154</sup>Sm</td><td>(0,1)</td><td>N/A</td><td>1250.21</td><td>-</td></tr> <tr> <th scope="row"><sup>155</sup>Pm</th><td>154.92810(3)</td><td>41.5(2) s</td><td>脽<sup>-</sup>聽to <sup>155</sup>Sm</td><td>(5/2-)</td><td>N/A</td><td>1258.28</td><td>-</td></tr> <tr> <th scope="row"><sup>156</sup>Pm</th><td>155.93106(4)</td><td>26.70(10) s</td><td>脽<sup>-</sup>聽to <sup>156</sup>Sm</td><td>4-</td><td>N/A</td><td>1257.05</td><td>-</td></tr> <tr> <th scope="row"><sup>157</sup>Pm</th><td>156.93304(12)</td><td>10.56(10) s</td><td>脽<sup>-</sup>聽to <sup>157</sup>Sm</td><td>(5/2-)</td><td>N/A</td><td>1265.13</td><td>-</td></tr> <tr> <th scope="row"><sup>158</sup>Pm</th><td>157.93656(14)</td><td>4.8(5) s</td><td>脽<sup>-</sup>聽to <sup>158</sup>Sm</td><td>N/A</td><td>N/A</td><td>1273.2</td><td>-</td></tr> <tr> <th scope="row"><sup>159</sup>Pm</th><td>158.93897(21)#</td><td>1.47(15) s</td><td>脽<sup>-</sup>聽to <sup>159</sup>Sm</td><td>5/2-#</td><td>N/A</td><td>1281.28</td><td>-</td></tr> <tr> <th scope="row"><sup>160</sup>Pm</th><td>159.94299(32)#</td><td>2# s</td><td>脽<sup>-</sup>聽to <sup>160</sup>Sm</td><td>N/A</td><td>N/A</td><td>1280.05</td><td>-</td></tr> <tr> <th scope="row"><sup>161</sup>Pm</th><td>160.94586(54)#</td><td>700# ms</td><td>脽<sup>-</sup>聽to <sup>161</sup>Sm</td><td>5/2-#</td><td>N/A</td><td>1288.12</td><td>-</td></tr> <tr> <th scope="row"><sup>162</sup>Pm</th><td>161.95029(75)#</td><td>500# ms</td><td>脽<sup>-</sup>聽to <sup>162</sup>Sm</td><td>N/A</td><td>N/A</td><td>1286.89</td><td>-</td></tr> <tr> <th scope="row"><sup>163</sup>Pm</th><td>162.95368(86)#</td><td>200# ms</td><td>脽<sup>-</sup>聽to <sup>163</sup>Sm</td><td>5/2-#</td><td>N/A</td><td>1294.96</td><td>-</td></tr> </table> </div> </div>  </div> </div> </div> <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script> <script src="https://www.americanelements.com/css/bootstrap/js/bootstrap.js"></script> <script src="https://www.americanelements.com/css/slippry.min.js"></script> <div class="scrollup">^</div> </div> <script> $(document).ready(function(){ $(window).scroll(function () { if ($(this).scrollTop() > 350) { $('.scrollup').fadeIn(500); 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