In organic chemistry, a<unk>  is an organic compound consisting entirely of hydrogen and carbon.<unk> s from which one hydrogen atom has been removed are functional groups, called hydrocarbyls.
Aromatic<unk> s (arenes), alkanes, alkenes, cycloalkanes and alkyne-based compounds are different types of<unk> s.
The majority of<unk> s found on Earth naturally occur in crude oil, where decomposed organic matter provides an abundance of carbon and hydrogen which, when bonded, can catenate to form seemingly limitless chains.
Hydrocarbon
Carbonyl
Amino acid
Haloalkane
Carbide
Goitrogen
Acyl
Polyphenol