| A | B |
|---|
| chemical formula | tells what elements a compound contains and the exact number of atoms of each element in a unit of that compound |
| chemical bond | the force that holds atoms together in a compound |
| ion | is a charged particle because it now has either more or fewer electrons than protons |
| ionic bond | the force of attraction between the opposite charges of the ions in an ionic compound |
| covalent bond | the attraction that forms between atoms when they share electrons |
| molecule | a neutral particle that forms as a result of electron sharing |
| polar molecule | a molecule that has a slightly positive end and a slightly negative end although the overall molecule is neutral |
| nonpolar molecule | a molecule in which electrons are shared equally in bonds |
| binary compound | a compound that is composed of two elements |
| oxidation number | tells you how many electrons an atom has gained, lost, or shared to become stable |
| polyatomic ion | is a negatively or positively charged, covalently bonded group of atoms |
| hydrate | a compound that has water chemically attached to its ions and written into its chemical formulas |
