Q. The number of unpaired electrons in $Z n^{2 +}$ is

2866 198 MP PMTMP PMT 1993The d-and f-Block Elements Report Error

A

2

21%

B

3

12%

C

4

9%

D

0

58%

Solution:

Zn(Z = 30) : $[A r]^{18} 3 d^{10} 4 s^{2}$
$Z n^{2 +} : [A r]^{18} 3 d^{10}$
No. of unpaired electrons = 0.