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Vocabulary 6
| Term | Definition |
|---|---|
| electron dot diagram | model of an atom in which each dot represents a valence electron |
| ion | an atom that has a net positive or negative charge |
| anion | an ion with a negative charge |
| cation | an ion with a positive charge |
| chemical bond | force that holds atoms or ions together as a unit |
| ionic bond | 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 | chemical bond in which two atoms share a pair of valence electrons |
| molecule | neutral group of atoms 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 the shared electrons that surround it |
| alloy | mixture of two or more elements, at least one of which is a metal |