Question

For Manganese atom, assuming that Hund's rule is not valid for I = 2 subshell predict the unpaired electrons and electron pairs in that subshell of atom :

• A. 5, 1
• B. 5, 0
• C. 1, 2
• D. 1, 3

Answer 1

The correct option is C 1, 2

If the Hund's rule is not valid for $l=2$ then out of $5$ valence electrons entering in $3d$ orbital, four electron will pair up first forming two electron pairs and one elecron will remain unpaired.