| A | B |
|---|
| electron dot diagram | a model of an atom in which each dot represents a valence electron |
| ion | an atom that has a net positive or negative electronic charge |
| anion | an ion with a negative charge |
| cation | an ion with a possitive charge |
| chemical bond | the force that holds atoms or ions together as a unit |
| ionic bond | the force that holds cations and anions together |
| chemical formula | a notation that shows what elements a compound contains and the ratio of the atoms or ions of these elements in the compound |
| crystals | solids whose particles are arranged in a lattice structure |
| covalent bond | a chemical bond in which two atoms share a pair of valence electrons |
| molecule | a neutral group of atoms that are joined together by one or more covalent bonds |
| polar covalent bond | a covalent bond in which electrons are not shared equally |
| polyatomic ion | a covalently bonded group as atoms that has a positive or negative charge and acts as a unit |
| metalic bond | the attraction between a metal cation and the shared electrons that surround it |
| alloy | a mixture of two or more elements, at least one of which is a metal |
