| 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 positive or negative charge |
| Anion | an ion with a negative charge |
| Cation | an ion with a positive 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 | 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 bonds | 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 bonds | 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 the 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 |
| chemical formula | chemical shorthand that uses symbols to tell what elements are in a compound and their ratios |
| chemical bond | force that holds atoms together in a compound |
| ion | charged particle that has either more or fewer electrons than protons |
| ionic bond | attraction formed between oppositely charged ions in an ionic compound |
| convalent bond | attraction formed between atoms when they share electrons |
| molecule | a neutral particle that forms as a result of electron sharing |
| polar molecule | molecule with a slightly positive end and a slightly negative end as a result of electrons being shared unequally |
| nonpolar molecule | molecule that shares electrons equally and does not have oppositely charged ends |
| ionic charge | positive or negative number that indicates how many electrons an atom has gained, lost, or shared to become stable |
| polyatomic ion | positively or negatively charged, convalently bonded group of atoms |
