The pair of which addition of 2nd electron in both the atom is endothermic 1 N,Ne 2 - Chemistry - The p-Block Elements

Question

The pair of which addition of 2nd electron in both the
atom is endothermic

1 N,Ne
2 Be,F
3 B,C
4 All of the above

Shyama Charan Mandal · Accepted Answer

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The pair of which addition of 2nd electron in both the atom is endothermic 1 N,Ne 2 Be,F 3 B,C 4 All of the above