5. Gain and Loss of Electrons   Previous PageNext Page
       Carbon and Carbonic Acid

The other oxide of carbon is carbon monoxide, CO. It results from incomplete combustion of carbon or its compounds, when insufficient oxygen is present. It is isoelectronic with the molecule; if by some magic we could pluck a proton out of the oxygen nucleus in CO and give it to the carbon, would be the result. Like , CO has a triple bond between atoms and one lone pair on each atom:

The electron pair for the third bond in CO must be provided entirely by the O atom, since it has six electrons in its outer shell, whereas C has only four.

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