| A | B |
|---|
| chemical formula | tells what elements a compound contains and the ratio of the atoms of those elements |
| chemically stable | when an atom's outer energy level is completely filled with electrons |
| chemical bond | a force that holds togethers the atoms in a substance |
| ion | atoms that have a positive or a negative charge |
| 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 |
| polar molecule | molecule with a positive end and a negative end |
| nonpolar molecule | molecule that does not have oppositely charged ends |
| toxic | poisonous compounds |
| corrosive | hazardous compounds that attack or alter substances |
| oxidation number | a positive or negative number assigned to an element to show its combining ability in a compound |
| binary compound | compound composed of two elements |
| polyatomic ion | positively or negatively charged, covalently bonded group of atoms |
| hydrate | a compound that has water chemically attached to its ions |
