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ch. 6 vocabulary

TermDefinition
electron dot diagram is a 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 is the force that holds atoms or ions together as a unit.
ionic bond is the force that holds cations and anions together.
chemical formula is a notation that shows what elements a compound contains and the ratio of the atoms or ions of the elements in the compound.
crystals solids whose particles are arranged in a lattice structure.
covalent bond is a chemical bond in which two atoms share a pair of valence electrons.
molecule is 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 is the attraction between a metal cation and the shared electrons that surround it.
alloy is a mixture of two or more elements, at least one of which is metal.
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