The number of nodal planes 'd' orbital has

Options

A. Zero
B. one
C. two
D. three

Answer

To determine the number of nodal planes in a d orbital, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Nodal Planes**: A nodal plane is a region in an atom where the probability of finding an electron is zero. This means that in these planes, the wave function of the electron is equal to zero.

2. **Identify the Quantum Numbers**: The number of nodal planes in an orbital is related to the azimuthal quantum number, denoted by \( l \). The value of \( l \) is associated with the shape of the orbital.

3. **Determine the Value of \( l \) for d Orbitals**: For d orbitals, the azimuthal quantum number \( l \) is equal to 2. This is because the d orbitals are the third type of orbitals (s, p, d, f), and they correspond to \( l = 0, 1, 2, 3 \) respectively.

4. **Calculate the Number of Nodal Planes**: The number of nodal planes in an orbital is given by the formula:
\[ \text{Number of Nodal Planes} = l \]
Therefore, for d orbitals where \( l = 2 \), the number of nodal planes is:
\[ \text{Number of Nodal Planes} = 2 \]

5. **Select the Correct Option**: Based on the options provided:
- Option 1: Zero
- Option 2: One
- Option 3: Two (Correct Answer)
- Option 4: Three

The correct answer is option 3, which states that the number of nodal planes in a d orbital is 2.

### Final Answer:
The number of nodal planes in a d orbital is **2**.

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