CHE 131 Lecture Notes 09-19-07

CHE 131 Lecture Notes 09-19-07 - CHE 131 Lecture Notes...

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CHE 131 Lecture Notes 09/19/07 Chemical Compounds Ions and Ionic Compounds 3.5 Exs. CaF2 (fluorite) CuSO4*5H20 (copper sulfate) CaCO3 (Calcite) NaCl (sodium chloride) All bulk matter is electrically neutral (neglecting the possibility of localized electrical charging) Consists of neutral entities or charged entities (always equal numbers of opposite charges) Monoatomic ion ? LOOK UP IN NOTES Transition metals (some), BRINCOLHOF, Group 1 and 2 most, group 3 only AL3+, Sn2+, Pb2+, and Bi3+, & some more…also N3- and C4- all of group 6 and 7; H as H+ or H- depending on what example it is Covalent bond – sharing of valence electrons Formation of ions – electron is either given away or taken completely; no sharing! H+ e- = H- Li+ + e- = Li w/3 e’s *All of these have Helium configuration, but H is the biggest, then He, then Li ion 2Li + H2 2LiH Li+ and H- The compound is stabilized by the electrostatic attractions between the cations and anions. Same crystal structure as NaCl
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CHE 131 Lecture Notes 09-19-07 - CHE 131 Lecture Notes...

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