Final answer:
The bonding interaction between the carbon and oxygen atoms in a carbonyl group is a double bond (C=O), which consists of a sigma bond and a pi bond. This double bond creates a polar bond with oxygen being more electronegative than carbon.
Step-by-step explanation:
The bonding interaction between the carbon and oxygen atoms in a carbonyl group is a double bond (C=O). The carbon and oxygen atoms each contribute one electron to form a sigma bond and share two electrons to form a pi bond. The double bond creates a polar bond, with oxygen being more electronegative than carbon, resulting in a slight negative charge on oxygen and a slight positive charge on carbon.