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Published bySabrina Flowers Modified over 9 years ago
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Starter Complete the full electronic configuration of: 1)Ti 2)Br 3)Cl - 4)Ca 2+ 5)Fe 3+ 6)Co 3+
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Covalent bonding L.O.: Describe a covalent bond as a shared pair of electrons. Describe single and multiple covalent bonding. Use dot-and-cross diagrams to represent covalent bonding. Describe dative covalent (coordinate) bonding. Use dot-and-cross diagrams to represent covalent bonding
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Octet rule.
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A covalent is a bond formed by a shared pair of electrons.
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Covalent bond formation in H 2
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Covalent bonding in Cl 2
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Covalent bonding in H 2 O, NH 3 and CH 4
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Draw dot-and-cross diagrams for: a) Cl 2 b) HCl c) SiF 4 d) SCl 2
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Q2, page 55.
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Dative covalent bonding in NH 4 + A dative covalent bond is a shared pair of electrons which has been provided by one of the bonding atoms only.
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The ammonium ion
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The oxonium ion
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Dot-and-cross diagram of BF 3
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Dot-and-cross diagram of SF 6
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Expansion of the octet: o unpaired electrons pair up o The maximum number of electrons that can pair up is equivalent to the number of electrons in the outer shell.
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Qs 1&2, page 57.
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