# How many orbitals are in the 3d subshell?

##### 1 Answer

Five.

#### Explanation:

The important thing to realize here is that there's nothing special about the **3d-subshell** in terms of the number of orbitals it contains.

The **d-subshell** contains **five orbitals** *regardless* of the energy level on which the subshell is located - as long as

Each *subshell* is characterized by a distinct value of the *angular momentum quantum number*, **orbitals** each subshell can hold is determined by the *magnetic quantum number*,

The relationshop between the *principal quantum number*,

#l = 0, 1, 2, ..., n-1#

and

#m_l = -l, -(l-1), ..., -1, 0, 1, ..., (l-1), l#

Now, the **d-subshell** is described by **any** d-subshell you'll ever run into will have a total of **five d-orbitals** described by

#m_l = {-2; -1; 0; 1; 2}#

Therefore, the **3d-subshell** will contain a total of **five 3d-orbitals**.

Likewise, the **4d-subshell** will contain a total of five 4d-orbitals, the **5d-subshell** will contain a total of five 5d-orbitals, and so on.