Periodic trends in bonding and structure

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Metallic Bonding

Metallic bonding is the strong electrostatic attraction between the positive metal ions and the delocalised electrons

Metallic bonding forms a giant metallic lattice

Properties

- Metals can conduct electricity in both solid and liquid states, as there are a 'sea' of delocalised electrons which are free to move through the whole structure

- Metals are insoluble as the metallic bonds are too strong

- Metals have high melting and boiling points because a large amount of energy is needed to break the strong metallic bonds

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Giant Covalent Lattice

Giant Covalent Lattice - A three-dimensional structure of atoms , bonded together by covalent bonds

Boron, Carbon and Silicon form Giant Covalent Lattices

Properties

- Giant Covalent Lattices don't conduct elecrity, as there are no free moving charged particles

- Giant Covalent Lattices are insoluble, as the covalent bonds are too strong

- Giant Covalent Lattices have very high melting and boiling points as a large amount of energy is needed to break the strong covalent bonds

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