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14 January, 12:27

Why is helium less reactive than hydrogen?

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  1. 14 January, 12:35
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    Each helium atom has a full valence electron shell, but each hydrogen atom only has one valence electron. Explanation: ... H has one electron in the outer shell therefore its reactive by gaining or losing the outermost electron. therefore H is more reactive than He as it has an incomplete valence electron shell.
  2. 14 January, 12:55
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    Each helium atom has a full valence electron shell, but each hydrogen atom only has one valence electron.
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