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.

KS
Answered by Kirsten S. Chemistry tutor

6330 Views

See similar Chemistry GCSE tutors

Related Chemistry GCSE answers

All answers ▸

An atom of iron is represented as 56 Fe 26 Give the number of protons, neutrons and electrons in this atom of iron.


In terms of structure and bonding, explain why graphite is able to conduct electricity.


write a balanced equation of the reaction between sodium and oxygen


How does a metal in powder form react faster with acid than the same metal in strips/blocks?


We're here to help

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

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences