Question

How many orbitals can exist at the third main energy level

a.3
b.6
c.9
d.18

Answer 1

The answer would be D, 18.

Answer 2

The energy level have different kinds of orbitals each orbital contain 2 electrons

So every orbital denoted as n2

Where when we consider 3rd energy orbital n= 3

Which is equal to 9 so third energy level has 9 orbital

So correct answer is (c)