Question

The electronic configuration of 4 elements a, b, c and d is as given under a - 2, 1 ; b - 2, 2 ; c- 2, 8, 2 ; d - 2
a) which among them belongs to the same group?
b) which among them belong to the same period?
c) which amongst them is inert?

Answer 1

Explanation:

a) b, c

b) a, b

c) d

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