AP Chemistry - Brown & Lemay Text
Subject:
Chemistry [1]
Lexi Eyerman ? AP CHEM SUMMARY 17 Oct. 2011 AP CHEMISTRY: UNIT 3 [pgs. 274-363, chapters 8-9] Scientific Laws, Theories, and BIG Ideas Chemical Bonds Ionic: electrons transfer; metals and nonmetals; exothermic (violent reactions); stable compounds; lattice energy ? energy to separate a mole of solid ionic compound into a gas (explained by Coulomb?s law) Covalent: electrons share; nonmetals; weaker bonds with low m.p. Metallic: sea of mobile electrons; good conductors of electricity; malleable and ductile Bond Polarity and Electronegativity Nonpolar Covalent: e- are equally shared; diatomic elements (no dif. in electronegativity) Polar Covalent: e- are unequally shared; dif. in electronegativity More electronegative atom is slightly negative in a bond