Explain the trend in reactivity of the elements in Group 7.

The Halogens decrease in reactivity as you descend through the group. The atoms increase in size and Mr as you go down the group. Therefore their outer electrons are further away from the positive charge of the nucleus. There is a weakened electrostatic force of attraction between the nucleus and the outer electron shell and so it is harder for the atom to complete the outer shell with a new electron.

Answered by Kirsten S. Chemistry tutor

4902 Views

See similar Chemistry GCSE tutors

Related Chemistry GCSE answers

All answers ▸

Describe the general structure of an atom.


Which substance is oxidised in the reaction represented by the ionic equation below? Zn(s) + Cu2+(aq) → Zn2+(aq) + Cu(s)


Describe how to separate hydrocarbons of different lengths


Why is graphite softer than diamond if they are made up from the same covalently bonded carbon atoms?


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo
Cookie Preferences