The subshells of n = 2?

There are two subshells for n=2.

Explanation:

Principal quantum number (n)

It tell about the energy levels. It is designated by n.

For example,

If n = 2

It means there are two energy level present.

Azimuthal quantum number (l)

The azimuthal quantum number describe the shape of orbitals. Its value for s, p, d, f ... are 0, 1, 2, 3.

(n-1)

2-1 = 1

thus possible values of l = 0,1

it means principle quantum is 2 and subshells are s and p ...