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31 August, 16:27

Among these element groups, which is least likely to form ions?: 7A 3A 1A 4A

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  1. 31 August, 16:41
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    The element group which is least likely to form ions is 4A group

    explanation

    Element of group 4A has 4 valence electrons. for example Carbon which has [He] 2S2 2P2 electron configuration has 4 valence electrons.

    Since 4A elements has 4 valence electrons, it means that their valence shell is half filled which is relatively stable. For this reason 4A element readily form ions.
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