Explain the difference in reactivity of the halogens as group 7 is descended.
The halogens become less reactive as the group is descended. The halogens react by accepting an electron into its outer shell from another atom. As the halogens are descended, the outer electron shell becomes further from the nucleus and therefore electrostatic forces between an incoming electron and the nucleus are smaller, reducing the likelihood of the halogen accepting an electron.
TA
Related Chemistry GCSE answers
All answers ▸What effect will increased temperature have on an equilibrium with a forward reaction which is exothermic?
State what is meant by the term covalent bond
Describe what is meant by a saturated hydrocarbon. (2)
Zinc reacts with dilute Hydrochloric acid, what is the chemical equation for this reaction? what would you see? How could you speed up this reaction?