Isotopes of helium

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If you find our videos helpful you can support us by buying something from amazon. • https://www.amazon.com/?tag=wiki-audi... • Isotopes of helium • Although there are nine known isotopes of helium (He) (relative atomic mass: 4.002602(2)), only helium-3 (3He) and helium-4 (4He) are stable.All radioisotopes are short-lived, the longest-lived being 6He with a half-life of 7002806700000000000♠806.7 milliseconds. • =======Image-Copyright-Info======= • Image is in public domain • Author-Info: ZYjacklin • Image Source: https://en.wikipedia.org/wiki/File:He... • =======Image-Copyright-Info======== • -Video is targeted to blind users • Attribution: • Article text available under CC-BY-SA • image source in video • •    • Isotopes of helium  

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