The quantum number l for an electron in an atom is 2. This electron is definitely located in:

Question

Quizplus · Accepted Answer

The quantum number $l$ corresponds to the angular momentum of an electron and defines the shape of the orbital. For $l = 2$, the electron is in a $d$ subshell, regardless of the principal quantum number $n$ (which defines the shell). Principal shells are denoted by $n$, and the first shell ($n=1$) cannot have an $l$ value of 2 since $l$ ranges from 0 to $n-1$. Therefore, the correct answer is that the electron is in a $d$ subshell.

The Quantum Number L for an Electron in an Atom