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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Presentation transcript:

Starter Complete the full electronic configuration of: 1)Ti 2)Br 3)Cl - 4)Ca 2+ 5)Fe 3+ 6)Co 3+

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

Octet rule.

A covalent is a bond formed by a shared pair of electrons.

Covalent bond formation in H 2

Covalent bonding in Cl 2

Covalent bonding in H 2 O, NH 3 and CH 4

Draw dot-and-cross diagrams for: a) Cl 2 b) HCl c) SiF 4 d) SCl 2

Q2, page 55.

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.

The ammonium ion

The oxonium ion

Dot-and-cross diagram of BF 3

Dot-and-cross diagram of SF 6

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.

Qs 1&2, page 57.