Metallic Bonding, Na, Mg, cation and delocalise electrons, conduct electicity when solid, giant lattice, Zn, react with water, high melting and boiling point, Ionic Bonding, NaCl, concuct electricity just when molten, AgBr, cation and anion, generally soluble with water, high melting and boiling temperatures, Covalent giant lattice, diamond, very high boiling and melting temperature, non conduct electricity, graphite, graphene, insoluble in water, SiO2, atoms, Covalent molecular, H2O, Cl2, S8, molecules, Covalent macromolecular, DNA, Proteins, Polymers.

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