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Question
Why is Helium so unreactive ?
Why is Helium so unreactive ?
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Solution
Helium atom have a full outer electron shell. Elements are chemically reactive only if they have an unfilled out shell.
The proton number of helium is two, so a helium atom has two electrons, which exist in the 1s shell. It doesn't gain or lose electrons to fill it's shell and is unreactive.
The proton number of helium is two, so a helium atom has two electrons, which exist in the 1s shell. It doesn't gain or lose electrons to fill it's shell and is unreactive.
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