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

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The element group which is least likely to form ions is 4A group


Step-by-step 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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