Question

Which one of the following element will lie in the same group as
Magnesium (z=12)

(a) X (Z=13) (b) Y(Z=14) (c) A(Z=2) (d) B(7=20)​

Answer 1

Answer:the answer is D

Explanation:The D element is calcium . it is in the second group.

4th period

electronic configuration is 1s2 2s2 2p6 3s2 3p6 4s2

and configuration of magnesium is

1s2 2s2 2p6 3s2

so thogh the period is different they belongs to the second group.

thank u