How does the structure of a carbon atom enable it to form large molecules

Answer: Because of the property known as Catenation.

Explanation: Catenation is the property of making molecules by self linkage.

This is the property mostly exhibited by the carbon. Thus it is famous for creating large molecules or large chains of carbon and hydrogen atoms.

This property is also exhibited sulfur of the chalcogen family.

The structure of a carbon atom enables it to form large molecules as it can form four chemical bonds to the other atoms as well. It usually forms covalent bond by sharing of the electrons.

Carbon is the only element that can form so many different compounds because each carbon atom can form four chemical bonds to other atoms, and because the carbon atom is just the right, small size to fit in comfortably as parts of a very large molecules.