Write combination reactions that occur when the metal barium reacts with the following nonmetals.
Nitrogen

Explanation

To write the combination reaction that occurs when the metal barium reacts with the non-metal nitrogen, we can follow these steps:

### Step 1: Identify the Reactants
The reactants in this reaction are barium (Ba) and nitrogen (N2). Barium is a metal, and nitrogen is a non-metal that exists as a diatomic molecule (N2).

### Step 2: Determine the Valences
- **Barium (Ba)**: Barium is in Group 2 of the periodic table and has a valence of +2 because it tends to lose two electrons.
- **Nitrogen (N)**: Nitrogen has a valence of -3 because it needs three additional electrons to complete its outer shell.
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