Question

Arrange in increasing order of (a). Size I, F,Cl,Br. (b). Oxidising power I,F,Br,Cl

Answer 1

Dear student,

(a) As we move down the group atomic number increases as well as the number of shells increases .
As the number of shells increases the size of an atom increases.
Size increases down the group = order = F < Cl < Br < I

(b) Oxidising power = ability to reduce itself
Down the group oxidising power decreases in halogens
order = I < Br < Cl < F

Regards