When ca+2 and o-2 form a compound what is the overall charge of the compound formed

The formation of a solid, also known as a is an indication of a chemical change. precipitate particulate particle powder

Many ionic compounds and a few highly polar covalent compounds are because they completely ionize in water to create a solution filled with charged ions that can conduct an electric current.

Describe the forces both attractive and repulsive that occur as two atoms move closer together.