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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 |