CHM 2045 Chapter Notes - Chapter 9: Metallic Bonding, Boiling Point, Chemical Polarity

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Ionic bonding (m + nm: metal (+) donates one or more of its outer electrons to a nonmetal (-) Ions are held together in an ionic lattice by electrostatic attractions: compounds generally have high boiling points and high melting points. Covalent bonding (nm + nm: an atom can share its outer electro(cid:374) with a(cid:374)other ato(cid:373)"s outer electro(cid:374)s, a covalent bond has a lower potential energy that the two separate atoms. Metallic bonding (m + m: the electro(cid:374)s are shared i(cid:374) a pool called (cid:862)sea of electro(cid:374)s(cid:863) The energy required when 1 mole an ionic solid separates into gas phase ions (h= +) The energy released when gas phase ions from 1 mole of an ionic solid (h= - ) ^ le = ^ melting and boiling point (the amount of energy holding an ionic compound together) The greater the charge, the greater the lattice energy. The greater the distance, the smaller the lattice energy.

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