Don’t mind what i wrote, i’m just very confused can someone help me? it’s for my stem chemistry class.

Arock can be broken down into different kinds of substances by physical processes. no chemical reactions are needed to separate different parts of a rock into pure substances. this is because a rock is a(n)

You may expect bonds between two atoms which each have n covalent lonic metallic hydrogen

For each of the compounds below, show that the charges on the ions add up to zero. a. kbr b. cao c. li(2)o d. cacl(2) e. alcl(3)