Question

The total number of orbitals associated with the principal quantum number n = 3 is
a) 9
b) 8
c) 5
d) 7

Answer 1

Answer :- 9 ⇒ Option (a) 

The total number of orbitals associated with the principal quantum number.
 For n = 3
 Hence the Number of orbitals = n²
= 3²
= 9

Explanation :-

We see that here for n= 3 

3s   ⇒ 1 orbital.
3p  ⇒ 3 orbitals.
3d  ⇒ 5 orbitals.

Hence the Total number of orbitals is 9 .


Hope it Helps :-) .

Answer 2

The correct answer for this question is 9.