Number of nodes present in 5f-orbital is

Explanation

To determine the number of nodes present in the 5f-orbital, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Concept of Nodes**:
- A node is a point in an orbital where the probability of finding an electron is zero.

2. **Use the Formula for Total Nodes**:
- The total number of nodes in an orbital can be calculated using the formula:
\[ \text{Total Nodes} = n - 1 \]
- Here, \( n \) is the principal quantum number.

3. **Identify the Principal Quantum Number**:
- For the 5f-orbital, the principal quantum number \( n \) is 5.

4. **Calculate the Total Nodes**:
- Substitute the value of \( n \) into the formula:
\[ \text{Total Nodes} = 5 - 1 = 4 \]

5. **Conclusion**:
- Therefore, the number of nodes present in the 5f-orbital is **4**.