The number of nodal planes '5d' orbital has, is

Options

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

Explanation

To determine the number of nodal planes in a 5d orbital, we can follow these steps:

### Step 1: Understand the concept of nodal planes
Nodal planes are regions in an orbital where the probability of finding an electron is zero. The number of nodal planes in an orbital is directly related to the angular momentum quantum number (l).

**Hint:** Remember that nodal planes are linked to the shape of the orbital and the value of l.

### Step 2: Identify the quantum numbers for the 5d orbital
The 5d orbital is characterized by two quantum numbers:
- The principal quantum number (n) = 5
- The angular momentum quantum number (l)

**Hint:** The principal quantum number indicates the energy level, while the angular momentum quantum number defines the shape of the orbital.

### Step 3: Determine the value of l for d orbitals
For d orbitals, the angular momentum quantum number (l) is always 2. This means that for any d orbital, including the 5d orbital, l = 2.

**Hint:** Recall the values of l for different types of orbitals:
- s orbitals: l = 0
- p orbitals: l = 1
- d orbitals: l = 2
- f orbitals: l = 3

### Step 4: Calculate the number of nodal planes
The number of nodal planes in an orbital is equal to the value of l. Since we have determined that for the 5d orbital, l = 2, it follows that the number of nodal planes is also 2.

**Hint:** The relationship is straightforward: the number of nodal planes = l.

### Conclusion
Therefore, the number of nodal planes in a 5d orbital is **2**.

**Final Answer:** 2

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