Number of nodal centres for 2s orbital

Options

A. 1
B. 0
C. 4
D. 3

Explanation

To determine the number of nodal centers for the 2s orbital, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Principal Quantum Number (N)**:
- For the 2s orbital, the principal quantum number \( N \) is 2.

2. **Identify the Azimuthal Quantum Number (L)**:
- The azimuthal quantum number \( L \) for an s orbital is 0. Therefore, for the 2s orbital, \( L = 0 \).

3. **Calculate the Number of Radial Nodes**:
- The formula for calculating the number of radial nodes is given by:
\[ \text{Radial Nodes} = N - L - 1 \]
- Substituting the values:
\[ \text{Radial Nodes} = 2 - 0 - 1 = 1 \]

4. **Calculate the Total Number of Nodes**:
- The total number of nodes in an orbital is given by:
\[ \text{Total Nodes} = N - 1 \]
- Substituting the value of \( N \):
\[ \text{Total Nodes} = 2 - 1 = 1 \]

5. **Conclusion**:
- Therefore, the number of nodal centers for the 2s orbital is **1**.