top of page
new sciteach chem small.png

Trends in properties



Grp 7 (17): The Halogens

AQA Content

explain the trend in electronegativity
explain the trend in the boiling point of the elements in terms of their structure and bonding.
silver nitrate solution is used to identify halide ions
the silver nitrate solution is acidified
ammonia solution is added.

Specification Notes

The trends in electronegativity and boiling point of the halogens.

The trend in oxidising ability of the halogens down the group, including displacement reactions of halide ions in aqueous solution.
The trend in reducing ability of the halide ions, including the reactions of solid sodium halides with concentrated sulfuric acid.
The use of acidified silver nitrate solution to identify and distinguish between halide ions.
The trend in solubility of the silver halides in ammonia.



bottom of page