Question

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

Answer 1

A carbon atom can bond to other carbon atoms



The reason is because carbon has the ability to form into its self.

Carbon haves most catenation power which means it can form bonds with other carbon atoms and this bonding of carbon in a long chain is called carbon chain.
The compounds which form by the long carbon chain are known as organic compounds

Carbon is in group 14 on the periodic table, which means it has 4 electrons in its outer shell. This means carbon has the ability to form up to 4 covalent bonds, sometimes with itself, thus we see 'latice' like structures form (diamond) which have incredible strength. This ability is similar in hydrocarbons and proteins, but not to the same strength which is seen with the 3D lattice affect
hydrocarbon are a long chain of carbon atoms which have a repeating units

other carbons

carbon is a very good element

Answer
because of its covlaency

Answer 2

@nia_mae I agree with that it's true ! but what about Silicon, which also has 4 electrons in its outer shell ???