If an element is in fifth group, then with respect to the hydrogen, it has valency

Options

A. 6
B. 5
C. 3
D. 2

Explanation

To determine the valency of an element in the fifth group with respect to hydrogen, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Group Number**:
- The question states that the element is in the fifth group of the periodic table.

2. **Determine the Valence Electrons**:
- Elements in the same group have the same number of valence electrons. Therefore, an element in the fifth group has 5 valence electrons.

3. **Understanding Valency**:
- Valency is defined as the ability of an atom to bond with other atoms, which is often determined by the number of electrons an atom can gain, lose, or share to achieve a full outer shell (noble gas configuration).

4. **Gain or Loss of Electrons**:
- Since the element has 5 valence electrons, it can either lose these electrons to achieve a stable configuration or gain electrons to fill its outer shell.
- To achieve a noble gas configuration, the element can gain 3 electrons (since it needs 8 electrons in its outer shell).

5. **Calculate the Valency**:
- If the element gains 3 electrons, its valency with respect to hydrogen (which has a valency of 1) will be 3. This means it can form three bonds with hydrogen atoms.

6. **Conclusion**:
- The valency of an element in the fifth group with respect to hydrogen is 3.

### Final Answer:
The valency of an element in the fifth group with respect to hydrogen is **3** (Option C).

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