# The shell having n=3 contains how many subshells?

Oct 30, 2015

3 subshells.

#### Explanation:

I have written a similar answer to this question, I will copy it here I hope it helps:

Shell is the energy level of an atom ($n = 1 , 2 , 3 , e t c .$). Inside every shell there is one or more subshells ($s , p , d , f , e t c .$). Inside every subshell there is one or more orbitals .

The best way to explain this is using the quantum numbers:

where,
$n$: principal quantum number
$l$: Angular momentum quantum number

The $s$ subshell contains 1 orbital.
The $p$ subshell contains 3 orbitals.
The $d$ subshell contains 5 orbitals.
The $f$ subshell contains 7 orbitals.