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CH 7-8-9 - notes 4-ionic vs covalent bonding

CH 7-8-9 - notes 4-ionic vs covalent bonding - AP chem...

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AP chem O’Malley Chapters 7, 8, 9 structure & bonding 4 Name: ____________________ Text: p 329 354 (8.1 8.9) © S. O’Malley 2010 Bonds result from the tendancy of a system to achieve its lowest possible energy. IONIC BONDING the _________________ of electrons. 1. Negative ions are called ______________ and positive ions are called ____________. 2. Main group elements form ions to achieve a noble gas ________________ __________________. 3. Ionic compounds have _______ melting points, conduct when dissolved in __________, or when _________. 4. Arrange the following in order of increasing size: (a) (b) (c) Se 2- Br - Rb + Sr 2+ Li + Na + K + Rb + Cs + Ba 2+ Cs + I - Te 2- LATTICE ENERGY the energy needed to change _____________ ions into the ______________ state. Li(s) Li(g) H = ______ kJ/mol Li(g) Li + (g) + e - H = ______ kJ/mol ½ F 2 (g) F(g) H = ______ kJ/mol F(g) + e - F - (g) H = ______ kJ/mol Li + (g) + F - (g) LiF(s) H = ______ kJ/mol *Lattice energy increases with greater ___________ and smaller ________. COVALENT BONDING 1. Atoms ___________ electrons to fill their __________ electron configurations. 2. Equal sharing (identical atoms) results in __________________ bonds. 3. Unequal sharing (different atoms) results in ________________ bonds.
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