Question

What is the maximum number of d orbitals in a principal energy level?

Answer 1

The answer is: 5 d-orbitals.

Principal quantum number (n) describes the size of the orbital.

There are one s orbital (angular quantum number l=0), three p orbitals (angular quantum number l=1 and magnetic quantum number ml = -1,0,+1) and five d orbitals (angular quantum number l=2 and magnetic quantum number ml = -2,-1,0,+1,+2).

d-orbitals are butterfly shaped.

Answer 2

The maximum number of D orbitals in a principal energy level is 5.