In discussing halogen reactivity (as covered in Core Idea), it is a common practice to argue that as you go down the Group 17 elements it becomes harder for the elements to gain an electron to form a ...

All alkali metal halides are white solids. Note that all the halogens are toxic, and so these reactions should be carried out in a fume cupboard.

Because chlorine is more reactive than bromine, it displaces bromine from sodium bromide. The solution turns brown. This brown colour is the displaced bromine. The chlorine has gone to form sodium ...

Ion chromatography can be utilized in various ways to analyze halogens and similar substances within inorganic matrices.