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Spencer Bruce
Chemistry
20 January, 16:43
Why does helium exist only as single atoms?
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Snowflake
20 January, 16:51
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Helium, He.
Helium is something known as a "Noble - Gas". It means that these elements have already achieved what every other element strives for, a full Valence Shell. Since Helium has already achieved this, it will not react (there are exceptions, but that's not important). An un-reactive element is called "inert". And Helium is inert, and will not exist as anything but a single atom.
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