What type of lattices are formed by alkali metal and alkaline earth metal hydrides

Explanation

To answer the question about the types of lattices formed by alkali metal and alkaline earth metal hydrides, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the General Formula for Hydrides:**
- Alkali metals (Group 1) form hydrides with the general formula \( \text{MH} \) (where M is the alkali metal).
- Alkaline earth metals (Group 2) form hydrides with the general formula \( \text{M}_2\text{H} \) (where M is the alkaline earth metal).

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