The electron are distributed around the nucleus in various energy levels shells, subshells and orbitals. A set of quantum numbers completely describe the position and total energy of electron in an atom. The various permitted values of quantum numbers are :
principal, `n = 1,2,3,4......`
azimuthal , `l = 0,1,2,....(n -1)`
magnetic, `m_l = -l .....0 .....+ l`
spin, `m_s = +1//2 and -1//2`.
How many orbital (of all kind) are possible for n = 3 energy level?

Explanation

To determine how many orbitals are possible for the n = 3 energy level, we need to consider the different types of subshells that can exist at this principal quantum number.

### Step-by-Step Solution:

1. **Identify the Principal Quantum Number (n):**
- Given: n = 3
- This indicates we are looking at the third energy level.

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