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It's Elemental - The Element Mercury
<!doctype html> <html lang="en-US"> <head> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta name="keywords" content="Mercury,elements,the element Mercury,element Mercury,elemental Mercury,uses of Mercury,history of Mercury,information about Mercury,table of elements,periodic table of elements,periodical table of elements"> <meta name="description" content="The Element Mercury - Known Isotopes"> <meta name="robots" content="index,all"> <link rel="stylesheet" href="/css/main_2020.css"> <link rel="stylesheet" href="/css/font-awesome.min.css"> <!-- icon library for hamburger menu and magnifying glass --> <link rel="stylesheet" href="/css/itselemental_2020.css"> <script async src="https://www.googletagmanager.com/gtag/js?id=G-3SJLGKR77H"></script><script>window.dataLayer = window.dataLayer || []; function gtag(){dataLayer.push(arguments);} gtag('js', new Date()); gtag('config', 'G-3SJLGKR77H');</script> <!-- load html5shiv if using an old IE --> <!-- this should be loaded after stylesheets --> <!--[if lt IE 9]> <script src="/js/html5shiv.js"></script> <![endif]--> <title>It's Elemental - The Element Mercury</title> </head> <body> <!-- top navigation start --> <div class="topnav" id="myTopnav"> <a href="/index.html" title="JLab Science Education Home"><img src="/g/scied_logo_sm.png" width="149" height="80" alt="Science Education Home"></a> <a href="/index.html" title="JLab Science Education Home">Home</a> <a href="/indexpages/teachers.html" title="Teacher Tools">Teachers</a> <a href="/indexpages/" title="Student Zone">Students</a> <a href="/indexpages/elementgames.html" title="Games and Puzzles">Games</a> <a href="/indexpages/science_videos.html" title="Science Videos">Videos</a> <a href="/solquiz/" title="Virginia Standards of Learning Practice Tests">VA SOL</a> <a href="/indexpages/program.html" title="Programs and Events">Programs</a> <div class="search-container"> <form action="/search/"> <input type="text" placeholder="Search..." name="q"> <button type="submit"><i class="fa fa-search"></i></button> </form> </div> <a href="javascript:void(0);" class="icon" title="Menu" onclick="navToggle();"> <i class="fa fa-bars"></i> </a> </div> <!-- top navigation end --> <!-- 'main' section start --> <main> <div class="content"> <h1 class="page-header">It's Elemental</h1> <!-- begin element navigation --> <!-- desktop size --> <div class="row element-nav regular"> <p class="left"> <a href="iso079.html"><img src="larr.gif" alt="Gold"></a> </p> <p class="left"> <a href="iso079.html">Previous Element<br><span class="nav-name">(Gold)</span></a> </p> <p> <a href="/itselemental/">The Periodic Table of Elements</a> </p> <p class="right"> <a href="iso081.html"><img src="rarr.gif" alt="Thallium"></a> </p> <p class="right"> <a href="iso081.html">Next Element<br><span class="nav-name">(Thallium)</span></a> </p> </div> <!-- phone size --> <div class="element-nav smallest"> <a href="index.html">The Table of Elements</a> </div> <!-- ^^ end element navigation ^^ --> <!-- begin inter-element navigation --> <!-- desktop size --> <div class="regular"> <h2 class="subtitle">Isotopes of the Element Mercury</h2> <p class="other-data">[<a href="ele080.html">Click for Main Data</a>]</p> </div> <!-- phone size --> <div class="smallest"> <h2 class="subtitle">Mercury</h2> <div class="extra-navigation">| <a href="iso079.html">Previous</a> | <a href="ele080.html">Main Data</a> | <a href="iso081.html">Next</a> |</div> </div> <!-- ^^ end inter-element navigation ^^ --> <p>Most of the isotope data on this site has been obtained from the <a href="http://www.nndc.bnl.gov/" class="external">National Nuclear Data Center</a>. Please <a href="http://www.nndc.bnl.gov/" class="external">visit their site</a> for more information.</p> <p class="tbltitle">Isotopes With A Known Natural Abundance</p><div class="isotope-table"><table class="isotope"><tr><td class="hd">Mass Number</td><td class="hd">Natural Abundance</td><td class="hd">Half-life</td></tr><tr><td class="nat">196</td><td class="nat">0.15%</td><td class="nat nowrap">STABLE</td></tr><tr><td class="nat">198</td><td class="nat">9.97%</td><td class="nat nowrap">STABLE</td></tr><tr><td class="nat">199</td><td class="nat">16.87%</td><td class="nat nowrap">STABLE</td></tr><tr><td class="nat">200</td><td class="nat">23.10%</td><td class="nat nowrap">STABLE</td></tr><tr><td class="nat">201</td><td class="nat">13.18%</td><td class="nat nowrap">STABLE</td></tr><tr><td class="nat">202</td><td class="nat">29.86%</td><td class="nat nowrap">STABLE</td></tr><tr><td class="nat">204</td><td class="nat">6.87%</td><td class="nat nowrap">STABLE</td></tr></table></div> <p class="tbltitle">Known Isotopes</p> <div class="isotope-table"><table class="isotope"><tr><td class="hd">Mass Number</td><td class="hd">Half-life</td><td class="hd">Decay Mode</td><td class="hd">Branching Percentage</td></tr><tr><td class="new">171</td><td class="new nowrap">59 microseconds</td><td class="new"><a href="/glossary/alphadecay.html">Alpha Decay</a></td><td class="new">100.00%</td></tr><tr><td class="new">172</td><td class="new nowrap">231 microseconds</td><td class="new"><a href="/glossary/alphadecay.html">Alpha Decay</a></td><td class="new">100.00%</td></tr><tr><td class="new">173</td><td class="new nowrap">0.6 milliseconds</td><td class="new"><a href="/glossary/alphadecay.html">Alpha Decay</a></td><td class="new">100.00%</td></tr><tr><td class="new">174</td><td class="new nowrap">2.1 milliseconds</td><td class="new"><a href="/glossary/alphadecay.html">Alpha Decay</a></td><td class="new">99.60%</td></tr><tr><td class="new">175</td><td class="new nowrap">10.6 milliseconds</td><td class="new"><a href="/glossary/alphadecay.html">Alpha Decay</a></td><td class="new">100.00%</td></tr><tr><td class="new">176</td><td class="new nowrap">20.3 milliseconds</td><td class="new"><a href="/glossary/alphadecay.html">Alpha Decay</a></td><td class="new">94.00%</td></tr><tr><td class="new">177</td><td class="new nowrap">118 milliseconds</td><td class="new"><a href="/glossary/alphadecay.html">Alpha Decay</a></td><td class="new">100.00%</td></tr><tr><td class="new">178</td><td class="new nowrap">266.5 milliseconds</td><td class="new"><a href="/glossary/alphadecay.html">Alpha Decay</a></td><td class="new">~ 70.00%</td></tr><tr><td></td><td></td><td><a href="/glossary/electroncapture.html">Electron Capture</a></td><td>~ 30.00%</td></tr><tr><td class="new">179</td><td class="new nowrap">1.05 seconds</td><td class="new"><a href="/glossary/electroncapture.html">Electron Capture</a></td><td class="new">45.00%</td></tr><tr><td></td><td></td><td><a href="/glossary/electroncapture.html">Electron Capture</a> with<br>delayed <a href="/glossary/proton_emission.html">Proton Emission</a></td><td>~ 0.15%</td></tr><tr><td></td><td></td><td><a href="/glossary/alphadecay.html">Alpha Decay</a></td><td>55.00%</td></tr><tr><td class="new">180</td><td class="new nowrap">2.58 seconds</td><td class="new"><a href="/glossary/electroncapture.html">Electron Capture</a></td><td class="new">52.00%</td></tr><tr><td></td><td></td><td><a href="/glossary/alphadecay.html">Alpha Decay</a></td><td>48.00%</td></tr><tr><td class="new">181</td><td class="new nowrap">3.6 seconds</td><td class="new"><a href="/glossary/electroncapture.html">Electron Capture</a></td><td class="new">73.00%</td></tr><tr><td></td><td></td><td><a href="/glossary/alphadecay.html">Alpha Decay</a></td><td>27.00%</td></tr><tr><td></td><td></td><td><a href="/glossary/electroncapture.html">Electron Capture</a> with<br>delayed <a href="/glossary/proton_emission.html">Proton Emission</a></td><td>0.01%</td></tr><tr><td></td><td></td><td><a href="/glossary/electroncapture.html">Electron Capture</a> with<br>delayed <a href="/glossary/alphadecay.html">Alpha Decay</a></td><td>9.0×10<sup class="isosup">-6 </sup>%</td></tr><tr><td class="new">182</td><td class="new nowrap">10.83 seconds</td><td class="new"><a href="/glossary/electroncapture.html">Electron Capture</a></td><td class="new">84.80%</td></tr><tr><td></td><td></td><td><a href="/glossary/alphadecay.html">Alpha Decay</a></td><td>15.20%</td></tr><tr><td class="new">183</td><td class="new nowrap">9.4 seconds</td><td class="new"><a href="/glossary/alphadecay.html">Alpha Decay</a></td><td class="new">11.70%</td></tr><tr><td></td><td></td><td><a href="/glossary/electroncapture.html">Electron Capture</a> with<br>delayed <a href="/glossary/proton_emission.html">Proton Emission</a></td><td>2.6×10<sup class="isosup">-4 </sup>%</td></tr><tr><td></td><td></td><td><a href="/glossary/electroncapture.html">Electron Capture</a></td><td>88.30%</td></tr><tr><td class="new">184</td><td class="new nowrap">30.87 seconds</td><td class="new"><a href="/glossary/electroncapture.html">Electron Capture</a></td><td class="new">98.89%</td></tr><tr><td></td><td></td><td><a href="/glossary/alphadecay.html">Alpha Decay</a></td><td>1.11%</td></tr><tr><td class="new">185</td><td class="new nowrap">49.1 seconds</td><td class="new"><a href="/glossary/electroncapture.html">Electron Capture</a></td><td class="new">94.00%</td></tr><tr><td></td><td></td><td><a href="/glossary/alphadecay.html">Alpha Decay</a></td><td>6.00%</td></tr><tr><td class="new">185<sub>m</sub></td><td class="new nowrap">21.6 seconds</td><td class="new">Isomeric Transition</td><td class="new">54.00%</td></tr><tr><td></td><td></td><td><a href="/glossary/electroncapture.html">Electron Capture</a></td><td>46.00%</td></tr><tr><td></td><td></td><td><a href="/glossary/alphadecay.html">Alpha Decay</a></td><td>~ 0.03%</td></tr><tr><td class="new">186</td><td class="new nowrap">1.38 minutes</td><td class="new"><a href="/glossary/alphadecay.html">Alpha Decay</a></td><td class="new">0.02%</td></tr><tr><td></td><td></td><td><a href="/glossary/electroncapture.html">Electron Capture</a></td><td>99.98%</td></tr><tr><td class="new">187</td><td class="new nowrap">2.4 minutes</td><td class="new"><a href="/glossary/electroncapture.html">Electron Capture</a></td><td class="new">100.00%</td></tr><tr><td></td><td></td><td><a href="/glossary/alphadecay.html">Alpha Decay</a></td><td>< 3.7×10<sup class="isosup">-4 </sup>%</td></tr><tr><td class="new">187<sub>m</sub></td><td class="new nowrap">1.9 minutes</td><td class="new"><a href="/glossary/electroncapture.html">Electron Capture</a></td><td class="new">100.00%</td></tr><tr><td></td><td></td><td><a href="/glossary/alphadecay.html">Alpha Decay</a></td><td>< 3.7×10<sup class="isosup">-4 </sup>%</td></tr><tr><td class="new">188</td><td class="new nowrap">3.25 minutes</td><td class="new"><a href="/glossary/electroncapture.html">Electron Capture</a></td><td class="new">100.00%</td></tr><tr><td></td><td></td><td><a href="/glossary/alphadecay.html">Alpha Decay</a></td><td>3.7×10<sup class="isosup">-5 </sup>%</td></tr><tr><td class="new">189</td><td class="new nowrap">7.6 minutes</td><td class="new"><a href="/glossary/electroncapture.html">Electron Capture</a></td><td class="new">100.00%</td></tr><tr><td></td><td></td><td><a href="/glossary/alphadecay.html">Alpha Decay</a></td><td>< 3.0×10<sup class="isosup">-5 </sup>%</td></tr><tr><td class="new">189<sub>m</sub></td><td class="new nowrap">8.6 minutes</td><td class="new"><a href="/glossary/electroncapture.html">Electron Capture</a></td><td class="new">100.00%</td></tr><tr><td></td><td></td><td><a href="/glossary/alphadecay.html">Alpha Decay</a></td><td>< 3.0×10<sup class="isosup">-5 </sup>%</td></tr><tr><td class="new">190</td><td class="new nowrap">20.0 minutes</td><td class="new"><a href="/glossary/electroncapture.html">Electron Capture</a></td><td class="new">100.00%</td></tr><tr><td></td><td></td><td><a href="/glossary/alphadecay.html">Alpha Decay</a></td><td>< 3.4×10<sup class="isosup">-7 </sup>%</td></tr><tr><td class="new">191</td><td class="new nowrap">49 minutes</td><td class="new"><a href="/glossary/electroncapture.html">Electron Capture</a></td><td class="new">100.00%</td></tr><tr><td></td><td></td><td><a href="/glossary/alphadecay.html">Alpha Decay</a></td><td>5.0×10<sup class="isosup">-6 </sup>%</td></tr><tr><td class="new">191<sub>m</sub></td><td class="new nowrap">50.8 minutes</td><td class="new"><a href="/glossary/electroncapture.html">Electron Capture</a></td><td class="new">100.00%</td></tr><tr><td class="new">192</td><td class="new nowrap">4.85 hours</td><td class="new"><a href="/glossary/electroncapture.html">Electron Capture</a></td><td class="new">100.00%</td></tr><tr><td class="new">193</td><td class="new nowrap">3.80 hours</td><td class="new"><a href="/glossary/electroncapture.html">Electron Capture</a></td><td class="new">100.00%</td></tr><tr><td class="new">193<sub>m</sub></td><td class="new nowrap">11.8 hours</td><td class="new"><a href="/glossary/electroncapture.html">Electron Capture</a></td><td class="new">92.80%</td></tr><tr><td></td><td></td><td>Isomeric Transition</td><td>7.20%</td></tr><tr><td class="new">194</td><td class="new nowrap">444 years</td><td class="new"><a href="/glossary/electroncapture.html">Electron Capture</a></td><td class="new">100.00%</td></tr><tr><td class="new">195</td><td class="new nowrap">10.53 hours</td><td class="new"><a href="/glossary/electroncapture.html">Electron Capture</a></td><td class="new">100.00%</td></tr><tr><td class="new">195<sub>m</sub></td><td class="new nowrap">41.6 hours</td><td class="new">Isomeric Transition</td><td class="new">54.20%</td></tr><tr><td></td><td></td><td><a href="/glossary/electroncapture.html">Electron Capture</a></td><td>45.80%</td></tr><tr><td class="new">196</td><td class="new nowrap">STABLE</td><td class="new">-</td><td class="new">-</td></tr><tr><td class="new">197</td><td class="new nowrap">64.14 hours</td><td class="new"><a href="/glossary/electroncapture.html">Electron Capture</a></td><td class="new">100.00%</td></tr><tr><td class="new">197<sub>m</sub></td><td class="new nowrap">23.8 hours</td><td class="new">Isomeric Transition</td><td class="new">91.40%</td></tr><tr><td></td><td></td><td><a href="/glossary/electroncapture.html">Electron Capture</a></td><td>8.60%</td></tr><tr><td class="new">198</td><td class="new nowrap">STABLE</td><td class="new">-</td><td class="new">-</td></tr><tr><td class="new">199</td><td class="new nowrap">STABLE</td><td class="new">-</td><td class="new">-</td></tr><tr><td class="new">199<sub>m</sub></td><td class="new nowrap">42.67 minutes</td><td class="new">Isomeric Transition</td><td class="new">100.00%</td></tr><tr><td class="new">200</td><td class="new nowrap">STABLE</td><td class="new">-</td><td class="new">-</td></tr><tr><td class="new">201</td><td class="new nowrap">STABLE</td><td class="new">-</td><td class="new">-</td></tr><tr><td class="new">202</td><td class="new nowrap">STABLE</td><td class="new">-</td><td class="new">-</td></tr><tr><td class="new">203</td><td class="new nowrap">46.594 days</td><td class="new"><a href="/glossary/betadecay.html">Beta-minus Decay</a></td><td class="new">100.00%</td></tr><tr><td class="new">204</td><td class="new nowrap">STABLE</td><td class="new">-</td><td class="new">-</td></tr><tr><td class="new">205</td><td class="new nowrap">5.14 minutes</td><td class="new"><a href="/glossary/betadecay.html">Beta-minus Decay</a></td><td class="new">100.00%</td></tr><tr><td class="new">205<sub>m</sub></td><td class="new nowrap">1.09 milliseconds</td><td class="new">Isomeric Transition</td><td class="new">100.00%</td></tr><tr><td class="new">206</td><td class="new nowrap">8.32 minutes</td><td class="new"><a href="/glossary/betadecay.html">Beta-minus Decay</a></td><td class="new">100.00%</td></tr><tr><td class="new">207</td><td class="new nowrap">2.9 minutes</td><td class="new"><a href="/glossary/betadecay.html">Beta-minus Decay</a></td><td class="new">100.00%</td></tr><tr><td class="new">208</td><td class="new nowrap">41 minutes</td><td class="new"><a href="/glossary/betadecay.html">Beta-minus Decay</a></td><td class="new">100.00%</td></tr><tr><td class="new">209</td><td class="new nowrap">35 seconds</td><td class="new"><a href="/glossary/betadecay.html">Beta-minus Decay</a></td><td class="new">100.00%</td></tr><tr><td class="new">210</td><td class="new nowrap">> 300 nanoseconds</td><td class="new"><a href="/glossary/betadecay.html">Beta-minus Decay</a> (suspected)</td><td class="new">No Data Available</td></tr><tr><td class="new">211</td><td class="new nowrap">> 300 nanoseconds</td><td class="new"><a href="/glossary/betadecay.html">Beta-minus Decay</a></td><td class="new">No Data Available</td></tr><tr><td></td><td></td><td><a href="/glossary/betadecay.html">Beta-minus Decay</a> with<br>delayed <a href="/glossary/neutron_emission.html">Neutron Emission</a></td><td>No Data Available</td></tr><tr><td class="new">212</td><td class="new nowrap">> 300 nanoseconds</td><td class="new"><a href="/glossary/betadecay.html">Beta-minus Decay</a></td><td class="new">No Data Available</td></tr><tr><td></td><td></td><td><a href="/glossary/betadecay.html">Beta-minus Decay</a> with<br>delayed <a href="/glossary/neutron_emission.html">Neutron Emission</a></td><td>No Data Available</td></tr><tr><td class="new">213</td><td class="new nowrap">> 300 nanoseconds</td><td class="new"><a href="/glossary/betadecay.html">Beta-minus Decay</a></td><td class="new">No Data Available</td></tr><tr><td></td><td></td><td><a href="/glossary/betadecay.html">Beta-minus Decay</a> with<br>delayed <a href="/glossary/neutron_emission.html">Neutron Emission</a></td><td>No Data Available</td></tr><tr><td class="new">214</td><td class="new nowrap">> 300 nanoseconds</td><td class="new"><a href="/glossary/betadecay.html">Beta-minus Decay</a></td><td class="new">No Data Available</td></tr><tr><td></td><td></td><td><a href="/glossary/betadecay.html">Beta-minus Decay</a> with<br>delayed <a href="/glossary/neutron_emission.html">Neutron Emission</a></td><td>No Data Available</td></tr><tr><td class="new">215</td><td class="new nowrap">> 300 nanoseconds</td><td class="new"><a href="/glossary/betadecay.html">Beta-minus Decay</a></td><td class="new">No Data Available</td></tr><tr><td></td><td></td><td><a href="/glossary/betadecay.html">Beta-minus Decay</a> with<br>delayed <a href="/glossary/neutron_emission.html">Neutron Emission</a></td><td>No Data Available</td></tr><tr><td class="new">216</td><td class="new nowrap">> 300 nanoseconds</td><td class="new"><a href="/glossary/betadecay.html">Beta-minus Decay</a> with<br>delayed <a href="/glossary/neutron_emission.html">Neutron Emission</a></td><td class="new">No Data Available</td></tr><tr><td></td><td></td><td><a href="/glossary/betadecay.html">Beta-minus Decay</a></td><td>No Data Available</td></tr></table></div> <!-- citation and page contact --> <div class="row page-contact"> <div class="col-12"> <p><a href="/faq/index.html">Citation and linking information</a></p> <p>For questions about this page, please contact <a href="mailto:carolm@jlab.org">Carol McKisson</a>.</p> </div> </div> <!-- end citation and page contact --> </div> <!-- ^^ end of 'content' div ^^ --> </main> <!-- 'main' section end --> <!-- footer start --> <footer> <div class="jlab-footer-background"> <div class="jlab-footer-content clearfix"> <!-- right section, containing lab address and links --> <div class="jlab-footer-right-container"> <p class="address">Thomas Jefferson</p> <p class="address">National Accelerator Facility</p> <div class="scied-lower-box"> <p class="address2">OFFICE OF 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