Hydrogen molecules are

Options

A. Monoatomic and form `X_2^(2-)` types ions
B. Diatomic and from `X_2^-`type ions
C. Diatomic and from `X^-` as well as `X^+` type ions
D. Monoatomic and form `X^-` type ions

Answer

To solve the question regarding hydrogen molecules, we need to analyze the properties and behavior of hydrogen in terms of its molecular structure and ion formation.

### Step-by-Step Solution:

1. **Understanding Hydrogen Molecule**:
- Hydrogen exists primarily as a diatomic molecule, which means it consists of two hydrogen atoms. The molecular formula for hydrogen gas is H₂.

2. **Formation of Ions**:
- When a hydrogen atom loses one electron, it becomes a positively charged ion known as a hydronium ion (H⁺).
- Conversely, when a hydrogen atom gains an electron, it forms a negatively charged ion known as a hydride ion (H⁻).

3. **Summary of Findings**:
- From the above points, we can conclude that hydrogen can exist as a diatomic molecule (H₂) and can also form both positive (H⁺) and negative (H⁻) ions.

4. **Identifying the Correct Option**:
- Based on the analysis, we can conclude that the correct answer includes the characteristics of hydrogen as a diatomic molecule and its ability to form both types of ions. Therefore, the correct option is C.

### Final Answer:
- The correct option is C: Hydrogen molecules are diatomic and can form both H⁺ and H⁻ ions.

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