Question

) How many unpaired electrons are there in the ground state of C?

 

           A) 0

           B) 4

           C) 3

           D) 2

           E) 1

Answer 1

By applying the Hund's rule, carbon exhibits an electron configuration of 1s2 2s2 2p2. Experimentally, given this configuration, carbon at ground state will contain two unpaired electrons.

The answer will be 2 choice D.