Question

part 2 (2 points) calcium combined with hydrogen is... formula: x x he → δ name:

Explanation:

Step1: Determine valences

Calcium has a valence of +2, hydrogen has a valence of +1 or - 1. In metal - hydride compounds, hydrogen has a valence of -1.

Step2: Write the formula

Using the criss - cross method for ionic compounds, the formula of the compound formed by calcium and hydrogen is $CaH_2$.

Step3: Name the compound

The compound $CaH_2$ is named calcium hydride.

Answer:

Formula: $CaH_2$
Name: calcium hydride