Question

Question #f86af

Answer 1

The answer is D. `2`

Explanation:

The subshell in which an electron is located inside an atom is given by the angular momentum quantum number, `l`.

The `3d` subshell, just like any other `d` subshell, is characterized by

`l = 2`

Now, the magnetic quantum number, `m_l`, which tells you the orientation of the orbital that holds the electron, depends on the value of the angular momentum quantum number as given by

`m_l = {-l, -(l-1), ..., -1, 0 ,1, ..., (l-1), l}`

This means that an electron located in the `d` subshell can have

`m_l = {-2, -1, 0, 1, 2}`

You can thus say that the `d` subshell can hold a total of `5` orbitals, each denoted by a specific value of the magnetic quantum number.

As you can see, the only value given to you that is a match here is D. `2`.