| A | B |
|---|
| electron dot diagram | A diagram of an atom, ion or molecule in which each dot represents a valence electron |
| ion | An atom or group of atoms that has a postive or nagative charge |
| anion | An ion with a negative charge |
| cation | An ion with a positive charge |
| chemical bond | The force that holds atoms and ions together as a unit |
| ionic bond | The force that holds cations and anions together |
| chemical formula | 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 of atoms that has a positive or negative charge and acts as a unit |
| metallic bond | The attraction between a metal cation and shared electrons that surround it |
| alloy | A mixture of two or more elements, at least one of which is a metal, that has the characteristic properties of a metal |
