Based on the octet rule, nitrogen most likely forms a __ion. a) N3+
b) N3-
d) N2+
c) N2

b) N3-

Explanation:

The octet rule stipulates that a chemical specie is stable if it has eight electrons in its outermost shell.

Nitrogen belongs to group 15. This means that it has five electrons in its outermost shell. The formation  N3- means that it accepted three electrons.

This brings the total number of outermost electrons to eight in accordance with the octet rule.