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Reactivity of the halogens
Trend in reactivity Reactivity of the Group VII elements decreases down the group: chlorine is more reactive than bromine, which is more reactive than iodine.
Trend in reactivity
- Trend in reactivity Reactivity of the Group VII elements decreases down the group: chlorine is more reactive than bromine,
- which is more reactive than iodine.
- Smaller atoms attract an extra electron more strongly because the outer shell is closer to the nucleus.
What displacement means
- What displacement means A more reactive halogen takes the place of a less reactive halogen in a solution of its halide salt.
- The less reactive halogen is released as the free element.
Colours in water
- Colours in water Chlorine solution is colourless or very pale green, bromine solution is orange (yellow when dilute) and iodine solution is brown.