Question

Atom of which of the following element has maximum number of unpaired electrons? a) Co b) Cu c) Cr d) Zn

Answer 1

Answer:

Cr

Explanation:

Unpaired electrons means valence electrons

Cr can have up to 6 ( it's valence is 2,4,6)valence electrons while others have Co and Zn has 2 , and for Cu it can be 1 or 2