What happens when following elements are made to react with hydrogen.
State the conditions required, if any.
Nitrogen

Explanation

**Step-by-Step Solution:**

1. **Identify the Reaction**: When hydrogen (H₂) reacts with nitrogen (N₂), it forms ammonia (NH₃). This reaction is known as the Haber process.

2. **Write the Chemical Equation**: The balanced chemical equation for the reaction is:
\[ N_2(g) + 3H_2(g) \rightarrow 2NH_3(g) \]
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