Question

Quantum numbers of a subshell are n = 2 and l = 1. Identify the subshell.

• A. 2s
• B. 1s
• C. 2p
• D. 2d

Answer 1

The Correct Option is C

To determine the subshell based on the given quantum numbers, we need to understand what each quantum number represents in quantum chemistry:

Principal Quantum Number (n): This number indicates the energy level of the electron orbital. For n = 2, the electrons are in the second energy level.

Azimuthal Quantum Number (l): This number determines the shape of the orbital and is also referred to as the angular momentum quantum number. The values of l range from 0 to n-1.

l value	Subshell designation
0	s
1	p
2	d
3	f

For l = 1, the subshell is designated as p. Therefore, with n = 2 and l = 1, the subshell we are looking for is 2p.

Thus, the subshell corresponding to the quantum numbers n = 2 and l = 1 is 2p.

Answer 2

Explanation: 

The quantum numbers are:

• Principal quantum number (n) = 2 → This means the second shell.
• Azimuthal quantum number (l) = 1 → This corresponds to a p-subshell.

So, combining these: n = 2 and l = 1 → 2p subshell.

Correct Answer: 2p