Question

ion
Mnat has the
magnetic moment
4.9B.M the value
of
n is ?
​

Answer 1

Explanation:

As we know,

Magnetic moment =n(n+1); where n is no. of unpaired electron

here,

4.9=n(n+2) 

→n=4 means this ion has 4 unpaired electrons.

electronic configuration of Mn=1s2,2s22p6,3s23p63d54s2 have 5 unpaired electron so to have a ion with 4 unpaired electron, it has to loose 3 electron and ion forms is

25Mn3+:1s2,2s22p6,3s23p63d4; 

∴a=3