The molecular formula of pentane is C5H12. Three different carbon ‘skeletons’ are possible with five carbon atoms.

By filling the remaining valencies with hydrogen atoms, three structural isomers can be drawn for pentane.

forms strong bonds with many elements such as hydrogen (H), oxygen (O), nitrogen (N), sulphur (S), chlorine (Cl), etc. In addition, carbon atom can form multiple bonds with itself and atoms of other elements. This increases the number of carbon compounds.