Ionic: electrons are transferred from metal to nonmetal, crystal lattice, solid 1, high melting point, soluble in water 1, electrical conductivity (solution and liquid), cations (positive, lose electrons) + anions (negative, gain electrons), rule: octet + -ide at the end, covalent: electrons are shared between nonmetals, true molecules, liquid or gas, low melting point, usually not soluble, no electrical conductivity, odorous , low boiling point, rule: leftmost element 1st, 2nd ends in -ide, use suffix (no mono on 1st), metallic: electrons are delocalized among metals, electron sea, solid 2, very high melting point, soluble in water 2, conductive in any form, malleable, ductile, lustrous,

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