Bio - 2.1 (2) - Biochems and bonds

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2.1 (2) - Biochemicals and bonds

Charlotte Jones

Covalent Bonds and Carbon

Outer shells on atoms have a maximum of 8 electrons on them, the first shell around the atom, has 2.

Carbon has 4 electrons on it's outer shell, so gains stability by sharing 4 electrons with other atoms. The sharing of electrons forms a strong covalent bond. The bonded atoms form a molecule. Carbon can make a maximum of 4 covalent bonds.

Double bonds and carbon 

Double bonds occur when two bonds are made with another atom. C=C are double bonds in hydrocarbon chains, and C=O double bonds are found in many molecules, including organic acids.

Monomers and Polymers

Monomers refer to a single,


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