record chlorine some of the general properties an element in this position of the periodic table might have?

Answer 1

Cl is an halogene, like F or Br. They all have the properties to kill germs (Cl in pool water, F in toothpaste, Br in surgical antiseptics).

Answer 2

Group 7 elements
fluorine, chlorine, bromine
these elements have a minus 1 ionic state and thus are very reactive.
They increase in reactivity down their group.

Answer 3

Yes, mainly its high electronegativity accounts as a property that chlorine must have due to its position in the table (along with the other halogens: fluor, bromine, iodine).