Why is chlorine more reactive than iodine?
Chlorine's outer electrons are closer to the nucleus than iodine, so greater attraction from the positive nucleus making it easier to gain an electron.
HK
Related Chemistry GCSE answers
All answers ▸Describe an atom in terms of its sub-atomic particles and their relative mass, relative charge and its location
Describe the differences in molecular structure between graphite and diamond, and use this to explain their differing properties.
Why does the reactivity of the Group 1 elements increase as you go down the group?
Why can graphite conduct electricity but diamond cant?