I can’t see the whole question......
You did not include the list but F is fluorine. The first halogen.
So, you can expect that the other members of the same group (halogens, column 17 of the periodic table) exhibit similar chemical behavior (reactivity).
So, I am sure your list contains one or more of theses elements: Cl (chlorine), Br (bromine), and I (iodine).
All of them you can expect to also be reactive non metal.
Aluminum chloride - It does not have the prefix "tri-" since it is ionic. The other compounds listed in the question are covalent and require prefixes.
Answer:
can you show the question so we can read it
