The characteristic valence shell configurations of group-l3 and 14 elements are respectively

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ns2np1 and ns2np2

ns2np2 and ns2np3

ns2np3 and ns2np4

ns2np4 and ns2np5

answer is A.

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Detailed Solution

The characteristic configurations of group-l3 and 14 elements are ns2np1 and ns2np2, respectively.

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