Question

How many subshells are present in the N-shell?

Answer 1

Subshell is the collection of orbitals having the same value of ‘n’ and ‘l’. they are the orientations and shapes of an orbital. Shells are the group of atomic orbitals having the same value of principal quantum number ‘n’. shells contain sub-shells.

Complete answer:
Shells are the energy levels. They are numbered as $1,2,3 \ldots \;$sometimes they are represented in alphabets as K, L, M, N. The letter ‘n’ is usually used to represent the shell. The lower the number of ‘n’ the closer is the energy level or shell to the nucleus. It can handle up to $32$ electrons in total.
Subshells are the subdivision of electron shells separated by orbital. They are represented as s, p, d, f.
It is asked in the question to find out how many subshells are there in the N shell. So let us try to find out what might be the answer to this.
As we know that shells are represented as K, L, M, N. Every shell has a different subshell which they can have. K can have only $1$ subshell as $1s$. L can have only $2$ subshells $2s{\text{ }}and{\text{ }}2p$same way M can have only $3$ subshells which are $3s,{\text{ }}3p,{\text{ }}and{\text{ }}3d$in the same manner N shell can have only $4$ subshells naming $4s,{\text{ }}4p,{\text{ }}4d{\text{ }}and{\text{ }}4f.$
Therefore in the N-shell, there are $4$ subshells.

Note:
Every subshell has a certain number of electrons that it can accommodate. It is necessary to remember how the filling of electrons takes place. This is done based on three rules: the hund's rule, Pauli’s exclusion principle, and the Aufbau principle.