Answer
Quantum Number Concept Breakdown
Angular Momentum Quantum Number (ℓ): This quantum number determines the subshell or orbital type of an electron within an atom.
The values of ℓ and their corresponding subshells are:
- ℓ = 0 → s subshell
- ℓ = 1 → p subshell
- ℓ = 2 → d subshell
- ℓ = 3 → f subshell
Since ℓ = 2 corresponds to the d subshell, the correct answer is: d
Note: The option “+1/2” is a value for the spin quantum number (ms), not angular momentum.