In halogens, with the increase of atomic number which habit is found
Habit to loose electrons decreases
Ionic radii decreases
Ionization potential decreases
In MX2 (M=metal and X= halogen), covalent properties decreases
Ionization potential decreases. Since, atomic size increases.
In halogens, with the increase of atomic number ...
In halogen group which tendency works with increase in atomic number