the subshell that arlses after f subshell is called g subshell then the correct statement (s) regarding g subshell is/are (a) it contains 16electrons and 8 orbitals, (b) corresponds to` l= 4` and first of course in 5th energy level, (c) a `g` orbital can have maximum of two electrons (d) `5f` subshell has higher energy than `5g` subshell

Options

A. Only (a)
B. (b) & (c)
C. Only (b)
D. (b), (c) & (d)

Answer

To solve the question regarding the properties of the g subshell, let's analyze each statement step by step.

### Step-by-Step Solution:

1. **Understanding the g subshell**:
- The g subshell arises after the f subshell in the order of subshell filling.
- The angular momentum quantum number \( l \) for the g subshell is 4.

2. **Determining the number of orbitals**:
- The number of orbitals in a subshell is given by \( 2l + 1 \).
- For \( l = 4 \) (g subshell):
\[ \text{Number of orbitals} = 2(4) + 1 = 9 \]

3. **Calculating the maximum number of electrons**:
- Each orbital can hold a maximum of 2 electrons.
- Therefore, the maximum number of electrons in the g subshell is:
\[ \text{Maximum electrons} = 9 \text{ orbitals} \times 2 \text{ electrons/orbital} = 18 \text{ electrons} \]

4. **Identifying the energy level**:
- The g subshell corresponds to the 5th energy level (n=5) since it follows the f subshell (which is in the 4th energy level).
- Thus, the g subshell is indeed in the 5th energy level.

5. **Evaluating each statement**:
- **(a)** It contains 16 electrons and 8 orbitals. **(Incorrect)**: The g subshell has 18 electrons and 9 orbitals.
- **(b)** Corresponds to \( l = 4 \) and is the first subshell in the 5th energy level. **(Correct)**: This is true.
- **(c)** A g orbital can have a maximum of two electrons. **(Incorrect)**: A g subshell can hold up to 18 electrons in total, not just 2 per orbital.
- **(d)** The 5f subshell has higher energy than the 5g subshell. **(Incorrect)**: The 5f subshell has lower energy than the 5g subshell.

### Conclusion:
The correct statement regarding the g subshell is **(b)** only.