Coordination Number Last updated Save as PDF Share Share Share Tweet Share Page ID39382 Contributed by Gamini GunawardenaAssociate Professor (Chemistry) at Utah Valley University Coordination number of an atom in an organic molecule is the number of atoms directly bonded to it. For example, in 1 the coordination number of the carbon atom is four and that of the oxygen atom is two. Contributors Gamini Gunawardena from the OChemPal site (Utah Valley University)