| A | B |
|---|
| octet rule | model of chemical stability that states that atoms become stable by having 8 electrons in their outer energy level except for some of the smallest atoms which have only 2 electrons |
| noble gas configuration | state of an atom achieved by having the same valence electron configuration as a noble gas atom; the most stable configuration |
| ion | atom or group combined atoms that has a charge because of the loss or gain of electrons |
| ionic compound | compound comprised of ions |
| crystal | regular, repeating arrangement of atoms, ions, or molecules in 3 dimensions |
| covalent bond | attraction of 2 atoms for a shared pair of electrons |
| molecule | uncharged group of 2 or more atoms held together by covalent bonds |
| elecrolyte | any compound that conducts electricity when melted or dissolved in water |
| interparticle force | forces between the particles that make up a substance |
| covalent compound | compound whose atoms are held together by covalent bonds |
| ionic bond | strong attractive force between ions of opposite charge |
| chemical property | property that can be observed when there is a change in the composition of a substance |
| valence electron | electron in the outermost energy level of an atom |
