The maximum number of electrons that can be accommodated in M Shell of an atom are

Options

A. 8
B. 32
C. 18
D. 25

Answer

To determine the maximum number of electrons that can be accommodated in the M shell of an atom, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Principal Quantum Number for M Shell**:
- The M shell corresponds to the principal quantum number (n) of 3.

2. **Use the Formula for Maximum Electrons in a Shell**:
- The formula to calculate the maximum number of electrons in a shell is given by:
\[ \text{Maximum number of electrons} = 2n^2 \]

3. **Substitute the Value of n**:
- For the M shell, substitute n = 3 into the formula:
\[ \text{Maximum number of electrons} = 2 \times (3)^2 \]

4. **Calculate (3)^2**:
- First, calculate \(3^2\):
\[ 3^2 = 9 \]

5. **Multiply by 2**:
- Now, multiply the result by 2:
\[ 2 \times 9 = 18 \]

6. **Conclusion**:
- Therefore, the maximum number of electrons that can be accommodated in the M shell is 18.

### Final Answer:
The maximum number of electrons that can be accommodated in the M shell of an atom is **18**.

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