Hetero atom in a carbon compound: It is a compound formed by replacement of carbon and hydrogen by hetero atom in a compound. A hetero atom is any atom other than carbon or hydrogen. The atoms of these compounds substitute one or more hydrogen atoms in the hydrocarbon chain.
Typical heteroatoms are nitrogen, oxygen, sulfur, phosphorus, chlorine, bromine, and iodine.
Example:
1-Oxygen is hetero atom in ethanol (C2H5-O-H)
2-Nitrogen is the hetero atom in Ethyl amine ( CH3-CH2- NH2)