Covalent Bonding

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Covalent Bonding

Atoms make covalent bonds by sharing a pair of electrons between two atoms. This way, both atoms have a full outer shell. Each covalent bond provides one extra shared electron for each atom. Each atom has to make enough covalent bonds to fill its outer shell. When atoms make covalent bonds with one or more other atoms, they form a molecule.

Molecule                                                                  Dot and cross model

 Hydrogen (H2)                                               Shows a dot and cross model of a hydrogen electrons. The circle on the left has 1 red dot and the circle on the right has 1 blue cross. They overlap, and the cross and the dot are in the same area, representing a covalent bond. (http://www.bbc.co.uk/schools/gcsebitesize/science/images/gcsechem_109.gif)

Chlorine (Cl2)      

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