molecule where the ratio of atoms is 1 : 5, for example PCl5
the hydrogen atom, less its electron. A H+ ion.
polyvinyl chloride, a white material often used in paints.
when energy is added to an electron in the lowest energy state (the ground state) and it jumps...
a short way of writing the name of a chemical compound. It shows the composition of the compound...
the reactant that is completely consumed and determines how much product can be formed.