# Question #65790

##### 1 Answer

A 4f-orbital has **3** nodes.

#### Explanation:

There are actually two types of nodes an orbital can have, **radial nodes** and **angular nodes**.

As you know, a node denotes a region that surrounds a nucleus in which you have *zero probability of finding an electron*.

The two types of nodes that exist will thus be regions in which you have no electron density, with the mention that

- a
**radial node**is a sperical surface; - an
**angular node**is usually a flat plane (but it could also be a conical plane);

The number of *angulal nodes* is given by the angular momentum quantum number,

The number of *radial nodes* is given by both the angular momentum quantum number, and by the principal quantum number,

Therefore, the *taotal number of nodes* an orbital has is given by

In your case, the **4f-orbital** will have a total of