What determines the amount of energy an electron has?

When a scientific theory has been tested and proved by the scientific community, it becomes a law

Which rate indicates the number of children that would be born per woman if she were to live to the end of her child bearing years

Does the number of ions in solution increase, decrease, or remain constant? it continuously decreases. it continuously increases. it decreases at first, then increases. it increases at first, then decreases.