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

Explanation

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

### Step 1: Identify the Reactants
The reactants in this reaction are barium (Ba) and hydrogen (H₂). Barium is a metal, and hydrogen is a non-metal.

### Step 2: Understand Combination Reaction
A combination reaction is a type of chemical reaction where two or more substances combine to form a single product. The general form of a combination reaction can be represented as:
\[ A + B \rightarrow AB \]
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