Arrange the following:
`CaH_(2), BeH_(2)` and `TiH_(2)` in order of increasing electrical conductance.

Explanation

To arrange the compounds \( \text{CaH}_2 \), \( \text{BeH}_2 \), and \( \text{TiH}_2 \) in order of increasing electrical conductance, we need to analyze the nature of each hydride.

### Step 1: Identify the Type of Hydride
1. **\( \text{BeH}_2 \)**: This is a covalent hydride. Covalent hydrides generally do not conduct electricity because they do not dissociate into ions in solution or molten form.
2. **\( \text{CaH}_2 \)**: This is an ionic hydride. Ionic compounds can conduct electricity when melted or dissolved in water because they dissociate into ions.
3. **\( \text{TiH}_2 \)**: This is an interstitial hydride. Interstitial hydrides can conduct electricity at room temperature due to the presence of free electrons.

### Step 2: Determine Conductance Order
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