The Alpha Particle : Part 4 : Inside the Earth

<p><strong>The Field Guide to Particle Physics <br></strong><a href="https://pasayten.org/the-field-guide-to-particle-physics">https://pasayten.org/the-field-guide-to-particle-physics</a><br>©2021 The Pasayten Institute <a href="https://creativecommons.org/licenses/by-sa/4.0/">cc by-sa-4.0</a><br>The definitive resource for all data in particle physics is the Particle Data Group: <a href="https://pdg.lbl.gov/">https://pdg.lbl.gov</a>.</p><p>The Pasayten Institute is on a mission to build and share physics knowledge, without barriers! <a href="http://pasayten.org/heysean">Get in touch</a>.</p><p><strong>A few References and Resources for you.</strong></p><p>Isotopes of Helium:<br><a href="https://en.wikipedia.org/wiki/Isotopes_of_helium">https://en.wikipedia.org/wiki/Isotopes_of_helium</a></p><p>Helium Fact Sheet from NIST:<br><a href="https://webbook.nist.gov/cgi/inchi/InChI%3D1S/He">https://webbook.nist.gov/cgi/inchi/InChI%3D1S/He</a></p><p>CDC Fact sheet on Uranium-238:<br><a href="https://www.cdc.gov/nceh/radiation/emergencies/isotopes/uranium.htm">https://www.cdc.gov/nceh/radiation/emergencies/isotopes/uranium.htm</a></p><p>US Information Agency Facts on Energy Consumption:<br>US : <a href="https://www.eia.gov/energyexplained/us-energy-facts/">https://www.eia.gov/energyexplained/us-energy-facts/</a><br>World : <a href="https://www.eia.gov/todayinenergy/detail.php?id=49876">https://www.eia.gov/todayinenergy/detail.php?id=49876</a></p><p>Berkeley National Lab Essay on Earth's Heat<br><a href="https://newscenter.lbl.gov/2011/07/17/kamland-geoneutrinos/">https://newscenter.lbl.gov/2011/07/17/kamland-geoneutrinos/</a></p><p><br><strong>The Alpha Particle<br>Part 4 : Inside the Earth</strong></p><p><strong>Density</strong></p><p>Helium, Neon and Argon are all noble gases. None of them react to form chemicals. As the chemists are fond of saying, their electron valence shells are filled.</p><p>So why is Helium such a scare resource, while Argon in particular makes up a sizable fraction of our atmosphere?</p>