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<th class="navpanel-s"><a title="beryllium" href="../beryllium/history.html">Be</a></th> </tr> <tr> <th class="navpanel-v"> </th> <th class="navpanel-s">Na</th> <th class="navpanel-s"><a title="magnesium" href="../magnesium/history.html">Mg</a></th> </tr> <tr> <th class="navpanel-v"> </th> <th class="navpanel-s"><a title="potassium" href="../potassium/history.html">K</a></th> <th class="navpanel-s"><a title="calcium" href="../calcium/history.html">Ca</a></th> </tr> </table> </div> </li>  <li class="pure-menu-item v"> <div class="element_select_centre"><a class="imagelink" title="Switch to a different element from here" href="../index.html"><img class="" src="../_media/locs/Na-loc.png" alt="Sodium location" /></a> </div> </li>  <li class="pure-menu-item f"><a class="pure-menu-link f" href="../actinium/history.html">Actinium ☢</a></li> <li class="pure-menu-item p"><a class="pure-menu-link p" href="../aluminium/history.html">Aluminium</a></li> <li class="pure-menu-item p"><a 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href="../titanium/history.html">Titanium</a></li> <li class="pure-menu-item d"><a class="pure-menu-link d" href="../tungsten/history.html">Tungsten</a></li> <li class="pure-menu-item f"><a class="pure-menu-link f" href="../uranium/history.html">Uranium ☢</a></li> <li class="pure-menu-item d"><a class="pure-menu-link d" href="../vanadium/history.html">Vanadium</a></li> <li class="pure-menu-item p"><a class="pure-menu-link p" href="../xenon/history.html">Xenon</a></li> <li class="pure-menu-item f"><a class="pure-menu-link f" href="../ytterbium/history.html">Ytterbium</a></li> <li class="pure-menu-item d"><a class="pure-menu-link d" href="../yttrium/history.html">Yttrium</a></li> <li class="pure-menu-item d"><a class="pure-menu-link d" href="../zinc/history.html">Zinc</a></li> <li class="pure-menu-item d"><a class="pure-menu-link d" href="../zirconium/history.html">Zirconium</a></li> </ul> </div> </div>  <div class="pure-g"> <div class="pure-u-1"> <div class="pure-menu pure-menu-open pure-menu-horizontal centre" role="navigation" style="background: #000 url(../_media/elements/discharge/Na.png) repeat-y center; background-size:contain;"> <span><a class="pure-menu-heading" href="https://winter.group.shef.ac.uk/webelements/"><img height="30" src="../_media/icons/logo_60.png" alt="WebElements logo"></a> <a class="white" href="./">Sodium - <sub>11</sub>Na</a>  <audio id="myAudio_f"> <source src="../_media/elements/snds_f/Na.mp3" type="audio/mpeg">Your user agent does not support the HTML5 Audio element. </audio> <button class="pure-button s_button" style=" display: inline;" type="button" onclick="audf_play_pause()"> 🔊  </button> <script> function audf_play_pause() { var myAudiof = document.getElementById("myAudio_f"); if (myAudiof.paused) { myAudiof.play(); } else { myAudiof.pause(); }} </script></span> </div> </div> </div> <div id="main">  <div class="pure-u-1 pure-u-sm-1-1"> <div class="pure-menu pure-menu-horizontal pure-menu-scrollable"> <a href="#" class="pure-menu-link pure-menu-heading">▸▸</a> <ul class="pure-menu-list"> <li class="pure-menu-item">🇬🇧 Sodium</li> <li class="pure-menu-item">🇺🇦 Натрій</li> <li class="pure-menu-item">🇨🇳 鈉</li> <li class="pure-menu-item">🇳🇱 Natrium</li> <li class="pure-menu-item">🇫🇷 Sodium</li> <li class="pure-menu-item">🇩🇪 Natrium</li> <li class="pure-menu-item">🇮🇱 נתרן</li> <li class="pure-menu-item">🇮🇹 Sodio</li> <li class="pure-menu-item">🇯🇵 ナトリウム</li> <li class="pure-menu-item">🇵🇹 Sódio</li> <li class="pure-menu-item">🇪🇸 Sodio</li> <li class="pure-menu-item">🇸🇪 Natrium</li> <li class="pure-menu-item">🇷🇺 Натрий</li> </ul> </div> </div> <div class="pure-g"> <div class="pure-u-1 pure-u-sm-1-1"> <div class="google_navbar_positioning"> <form action="https://www.google.com" id="cse-search-box"> <div> <input type="hidden" name="cx" value="partner-pub-9334432533380510:6223510783"> <input type="hidden" name="ie" value="UTF-8"> <input type="text" name="q" size="28"> <input type="submit" name="sa" value="Search"> </div> </form> <script> </script> </div> </div> </div> <main> <div class="pure-g"> <div class="pure-u-1 pure-u-sm-1-1"> <h1 class="s">Sodium - <sub><small>11</small></sub>Na: historical information</h1> <div class="pure-menu pure-menu-horizontal pure-menu-scrollable"> <ul class="pure-menu-list z_menu"> <li class="pure-menu-item s"><a href="../sodium/" class="pure-menu-link">▸▸ Na Essentials</a></li> <li class="pure-menu-item s"><a class="pure-menu-link" href="../sodium/physics.html">Physical properties</a></li> <li class="pure-menu-item s"><a class="pure-menu-link" href="../sodium/atoms.html">Electron shell data</a></li> <li class="pure-menu-item s"><a class="pure-menu-link" href="../sodium/atom_sizes.html">Atom sizes</a></li> <li class="pure-menu-item s"><a class="pure-menu-link" href="../sodium/electronegativity.html">Electronegativity</a></li> <li class="pure-menu-item s"><a class="pure-menu-link" href="../sodium/isotopes.html" >Isotopes and NMR</a></li> <li class="pure-menu-item s"><a class="pure-menu-link" href="../sodium/crystal_structure.html">Crystal structure</a></li> <li class="pure-menu-item s"><a class="pure-menu-link" href="../sodium/thermochemistry.html">Thermochemistry</a></li> <li class="pure-menu-item s"><a class="pure-menu-link" href="../sodium/history.html">History</a></li> <li class="pure-menu-item s"><a class="pure-menu-link" href="../sodium/uses.html">Uses</a></li> <li class="pure-menu-item s"><a class="pure-menu-link" href="../sodium/geology.html">Geology</a></li> <li class="pure-menu-item s"><a class="pure-menu-link" href="../sodium/biology.html">Biology</a></li> <li class="pure-menu-item s"><a class="pure-menu-link" href="../sodium/compounds.html">Binary compounds</a></li> <li class="pure-menu-item s"><a class="pure-menu-link" href="../sodium/compound_properties.html" >Compound properties</a></li> <li class="pure-menu-item s"><a class="pure-menu-link" href="../sodium/chemistry.html">Element reactions</a></li> <li class="pure-menu-item s"><a class="pure-menu-link" href="../sodium/contents.html">List all Na properties</a></li> </ul> </div> </div> </div> <div class="teaser"> <ul class="ul_facts_table nobullets"> <li><strong><a href="../periodicity/discovery/" title="Further information on element discoveries">Discoveror</a>:</strong> Sir Humphrey Davy</li> <li><strong>Place of discovery:</strong> England</li> <li><strong>Date of discovery:</strong> 1807</li> <li><strong><a href="../periodicity/discovery/" title="Further information on element discoveries">Origin of name</a> </strong>: from the English word "<em>soda</em>" (the origin of the symbol Na comes from the Latin word "<em>natrium</em>"). </li> </ul> </div> <p class="p_first">Until the 18th century no distinction was made between potassium and sodium. This was because early chemists did not recognise that "mineral alkali" (Na<sub>2</sub>CO<sub>3</sub>, sodium carbonate, coming from deposits in the earth) and "vegetable alkali" (K<sub>2</sub>CO<sub>3</sub>, potassium carbonate, derived from wood ashes) are distinct from each other. Eventually a distinction was made.</p> <p>Sodium was first isolated in 1807 by Sir Humphry Davy, who made it by the electrolysis of very dry molten sodium hydroxide, NaOH. Sodium collected at the cathode. Davy isolated potassium by a similar procedure, also in 1807. Shortly after, Thenard and Gay-Lussac isolated sodium by reducing sodium hydroxide with iron metal at high temperatures.</p> <p>Sodium is one of the elements which has an alchemical symbol, shown below (alchemy is an ancient pursuit concerned with, for instance, the transformation of other metals into gold).</p> <p><img src="../_media/elements/alchemy/Na.gif" alt="alchemical symbol of sodium"></p> <p>Sometime prior to the autumn of 1803, the Englishman John Dalton was able to explain the results of some of his studies by assuming that matter is composed of atoms and that all samples of any given compound consist of the same combination of these atoms. Dalton also noted that in series of compounds, the ratios of the masses of the second element that combine with a given weight of the first element can be reduced to small whole numbers (the law of multiple proportions). This was further evidence for atoms. Dalton's theory of atoms was published by Thomas Thomson in the 3rd edition of his <em>System of Chemistry</em> in 1807 and in a paper about strontium oxalates published in the <em>Philosophical Transactions</em>. Dalton published these ideas himself in the following year in the <em>New System of Chemical Philosophy</em>. The symbol used by Dalton for sodium is shown below. [See <em>History of Chemistry</em>, Sir Edward Thorpe, volume 1, Watts & Co, London, 1914.]</p> <p class="pure-img"><img src="../_media/elements/dalton/Na.gif" alt="Dalton's symbol for sodium"></p> </main> <div id="footer"> <footer> <div class="footer"> <div class="pure-g"> <div class="pure-u-1-2 pure-u-sm-1-2 pure-u-lg-1-4 pure-menu custom-restricted-width"> <ul class="pure-menu-list"> <li class="pure-menu-heading footer_h">Key properties</li> <li class="pure-menu-item"><a class="pure-menu-link" href="https://www.webelements.com/periodicity/eneg_pauling/">Electronegativity </a></li> <li class="pure-menu-item"><a class="pure-menu-link" href="https://www.webelements.com/periodicity/melting_point/">Melting point</a></li> <li class="pure-menu-item"><a class="pure-menu-link" href="https://www.webelements.com/periodicity/density/">Density </a></li> <li class="pure-menu-item"><a class="pure-menu-link" href="https://www.webelements.com/periodicity/molar_volume/">Molar volume</a></li> <li class="pure-menu-item"><a class="pure-menu-link" href="https://www.webelements.com/periodicity/ionis_energy_1/">Ionization energy (1st)</a></li> <li class="pure-menu-item"><a class="pure-menu-link" href="https://www.webelements.com/periodicity/covalent_radius/">Covalent radius</a></li> <li class="pure-menu-item"><a class="pure-menu-link" href="https://www.webelements.com/periodicity/metallic_radius/">Metallic radius</a></li> <li class="pure-menu-item"><a class="pure-menu-link" href="https://www.webelements.com/periodicity/abund_crust/">Abundance: earth's crust</a></li> </ul> </div> <div class="pure-u-1-2 pure-u-sm-1-2 pure-u-lg-1-4 pure-menu custom-restricted-width"> <ul class="pure-menu-list"> <li class="pure-menu-heading footer_h">Shop</li> <li class="pure-menu-item">Sorry, shop closed</li> </ul> </div> <div class="pure-u-1-2 pure-u-sm-1-2 pure-u-lg-1-4 pure-menu custom-restricted-width"> <ul class="pure-menu-list"> <li class="pure-menu-heading footer_h">Social</li> <li class="pure-menu-item"><a class="pure-menu-link" href="https://www.facebook.com/webelements.periodic.table">Facebook</a></li> <li class="pure-menu-item"><a class="pure-menu-link" href="https://twitter.com/periodic_table">Twitter</a></li> <li class="pure-menu-item"><a class="pure-menu-link" href="https://www.pinterest.com/periodictable/">Pinterest</a></li> </ul> </div> <div class="pure-u-1-2 pure-u-sm-1-2 pure-u-lg-1-4 pure-menu custom-restricted-width"> <ul class="pure-menu-list"> <li class="pure-menu-heading footer_h">Administration</li> <li class="pure-menu-item"><a class="pure-menu-link" href="https://www.webelements.com/nexus/your-privacy/" title="Your privacy">Privacy</a></li> <li class="pure-menu-item"><a class="pure-menu-link" href="https://www.webelements.com/nexus/about-webelements/" title="About WebElements">About</a></li> <li class="pure-menu-item"><a class="pure-menu-link" href="https://www.webelements.com/nexus/webelements-and-copyright/" title="Copyright information about WebElements">Copyright</a></li> <li class="pure-menu-item"><a class="pure-menu-link" href="https://www.webelements.com/nexus/acknowledgements/" title="Acknowledgements">Thanks...</a></li> </ul> </div> </div> </div> <address> <p> <a href="https://www.webelements.com/"><img class="logo_m" src="../_media/icons/logo_60.png" alt="WebElements home" /></a><br /> <strong>WebElements:</strong> THE periodic table on the WWW [<a href="https://www.webelements.com/">www.webelements.com</a>]<br /> <a href="https://www.webelements.com/nexus/webelements-and-copyright/">Copyright </a> 1993-2024 <a href="https://winter.group.shef.ac.uk/">Mark Winter</a> [ <a href="https://www.sheffield.ac.uk/chemistry/">The University of Sheffield </a> and WebElements Ltd, UK]. 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