Question

Write electronic configuration of an element (at no.=28 ) and find out no of unpaired electrons in its divalent state. please be fast

Answer 1

Answer:

given bellow

Explanation:

The atomic number is 25. The metal is manganese with valence shell ,electronic configuration 3d  

5

4s  

2

. The divalent ion Mn  

2+

 has valence shell  electronic configuration 3d  

5

4s  

0

. It contains five unpaired electrons.

n=5

It's spin only magnetic moment is

n(n+2)

​  

=  

5(5+2)

​  

=  

35

​  

=5.92BM