what do you mean by helium gas?
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Helium is a noble gas or inert gas which has a stable electronic configuration and valency of zero
chuphal5321:
The element helium is a colorless, odorless gas. Because helium is lighter than air, it's commonly used for filling balloons to make them float. ... The word helium comes from a Greek root, helios, or "sun," because it was initially discovered in the sun's spectrum.
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Here is your answer
Helium gas is a noble gas with two protons, two neurons, two electrons helium is an colourless gas Helium is a non metal It was discovered in 1868 by Pierre Jansenne and Norman Locker
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