Nitrogen comnines with metals to form

Options

A. nitrites
B. nitrates
C. nitrosyl chloride
D. nitrides

Explanation

To answer the question "Nitrogen combines with metals to form," we need to analyze the options given: nitrites, nitrates, nitrosyl chloride, and nitrides.

### Step-by-Step Solution:

1. **Understanding Nitrogen Compounds**:
- Nitrogen can react with metals to form various compounds. The type of compound formed depends on the oxidation state of nitrogen and the metal involved.

2. **Identifying the Options**:
- **Nitrites (NO2-)**: These are salts or esters of nitrous acid (HNO2) and typically involve nitrogen in a +3 oxidation state.
- **Nitrates (NO3-)**: These are salts or esters of nitric acid (HNO3) and involve nitrogen in a +5 oxidation state.
- **Nitrosyl Chloride (NOCl)**: This is a compound formed from nitrogen monoxide and chlorine, not directly from metals.
- **Nitrides**: These are compounds formed when nitrogen combines with metals, typically involving nitrogen in a -3 oxidation state.

3. **Analyzing Metal-Nitrogen Reactions**:
- When nitrogen reacts with metals, it typically forms nitrides. For example, magnesium (Mg) reacts with nitrogen (N2) to form magnesium nitride (Mg3N2).

4. **Conclusion**:
- Based on the analysis, when nitrogen combines with metals, it forms **nitrides**. Therefore, the correct answer to the question is **nitrides**.

### Final Answer:
Nitrogen combines with metals to form **nitrides**.

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