Question

What gives carbon the ability to form chains that are almost unlimited in length?

Answer 1

The fact that carbon can form up to 4 covalent bonds as it possess 4 valence electrons gives it the ability to form chains that are almost unlimited in length.

Answer 2

The ability of carbon to form chains that are almost unlimited in length comes from the fact that a carbon atom can bond to other carbon atoms. Also, a carbon atom has 4 valence electrons which means one atom can bond to other four atoms. Hope this helps.