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...Chemical bonding and molecular geometry covalent bonds electronegativity polarity of lewis structures the octet rule exceptions to resonance bond energies calculating enthalpy using energy shape vsepr model review atomic properties effective nuclear charge size increases left right across periods decreases top bottom down a group ionization incresses period on electron affinity l r ionic compound atoms in sodium chloride common table salt are arranged maximize opposite charges interacting smaller spheres represent ions larger ones expanded view b can be seen more clearly note that each ion is bonded all surrounding six this case attractions between cations anions formed metals nonmetals...