Source: cirosantilli/discovery-of-the-noble-gases

= Discovery of the noble gases

Discovering them was not so easy because they don't form <chemical compounds>. So they exist only as gases. And <Helium> disperses off into space.

<Argon> was the first to be found by density considerations because it is so abundant on <Earth's atmosphere> (~1%): <Argon is abundant on Earth's atmosphere because it comes from the decay of Potassium-40>.

Then basically all of the others were discovered by <spectral lines>. <Helium> notably was first found on the <Sun> like that, and only later on Earth! Thus its name. Pretty cool.

\Video[https://www.youtube.com/watch?v=loqudG71uBM]
{title=The Incredible Discovery of the LEAST Reactive Elements by Chemistorian}
{description=2024. Great video.}

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