Constitutional Isomers

Question

Hi! I am a little confused on how to tell what is a constitutional isomer. I know that they are different structures with different functions that have the same molecular formula

for example are these constitutional isomers?

c-c-c-c-c-cl. c-c-c-c-c-c

|

cl

(all carbons are attached to hydrogens to fill octets)

Answer 1

left has 5 carbons, right has 6 carbons, they are different molecules not even isomers.

If you make them the same count of Carbons and keep Cl at the terminal Carbon, then these would be the same molecule, not isomers.

Recommending to get a molecular kit and check that at the terminal carbon all 3 positions are equivalent