Ionic bond - electrostatic forces of attraction between oppositely charged ions, covalent bond - shared pair of electrons , double covalent bond - two shared pairs of electrons , triple Covalent bond - three shared pairs of electrons , metallic bond - attraction between positive ions and a sea of delocalised electrons , metallic structure - regular arrangement of positive ions surrounded by a sea of delocalised electrons , diatomic - two atoms covalently bonded together, molecule - two or more atoms covalently bonded together , Molecular covalent compounds   - Have low boiling points, Giant Ionic Lattice - High melting points ,

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