| A | B |
|---|
| proton | positively charged particle with a weight of 1 |
| electron | negatively charged particle with little to no weight |
| neutron | neutral particle with a weight of 1 |
| atomic number | determines the identity of the element and the number of protons |
| atomic mass | the total of the protons and neutrons in the nucleus |
| atom | smallest part of an element |
| molecule | several atoms bonded together, smallest part of a compound |
| isotope | has a different atomic mass ans number of neutrons than an atom |
| ion | a charged atom protons do not equal electrons |
| cation | positively charged ion |
| anion | negatively charged ion |
| ionic bond | formed by a transfer of electrons between a metal and a non-metal |
| covalent bond | formed by the sharing of electrons between 2 meatls or 2 nonmetals |
| ionic solid | held by ionic bonds, is duly in water, good conductor, brittle, dissolves easily |
| covalent solid | held by covalent bonds, does not dissolve in water...only acetone, poor conductor |
| metallic solid | shiny and flexible, held by covalent bonds |
| the atom volume | in the shells |
| valence electrons | ourte shell electrons- roman numerals |
| octet rule | atoms gain or lose electrons to have 8 or 0 in the valence position |
| octet | 8 valence electrons, found in the noble gases |
