Question

Find out the number of unpaired electron in (a) Co²⁺ (b) Ni²⁺​

Answer 1

Answer:

Fe

2+

ion (Z=26) has electronic configuration [Ar]3d

6

4s

0

. It contains 4 unpaired electrons.

Zn

2+

has [Ar]3d

10

electronic configuration. It contains 0 unpaired electrons.

Ni

3+

has [Ar]3d

7

electronic configuration. It contains 3 unpaired electrons.

Cu+ has [Ar]3d

10

electronic configuration. It contains zero unpaired electrons.

Thus, the number of unpaired electrons is maximum in Fe

2+

.

Answer 2

Explanation:

Carbon dioxide is isostructural with which of the following ? ... The number of unpaired electrons in ferrous ion(Z = 26) is ... Find out the solubility of Ni(OH)2 in 0.1 M NaOH.