What is the atomicity of helium?
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The number of atoms present in one molecule of an element is called itsatomicity. Example. Noble gases (helium, neon, argon, krypton, etc.) have one atom each in their molecules such as He, Ne, Ar and Kr. So, theatomicity of noble gases is 1.
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heleum neon argon krypton xenon radon are noble gases hence their atomicity is always 1
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