Between C atoms can bond together Establish Chain of Atoms C are as follows:

C atom has four valence electrons that enable it to bind with each other C atoms. That's the uniqueness of C atoms so as to form a carbon chain length.

Based on the number of C atoms are tied up, there are 4 possible positions of C atoms in the carbon chain, the C atom of primary, secondary C atom, atom C tertiary, and quaternary C atoms. What is the difference between the four types of atom C?
 
Primary C atoms are C atoms only bind one other C atom, atom C is a secondary C atom that binds two other C atoms, C atoms are tertiary C atom that binds three other C atoms, whereas the quaternary C atom is an atom that binds C 4 other C atom.