Halogen anion (AS/A2 generic)
  Belongs to a sub-set of generics specific to the British A-Level exam system.

Wikipedia Page:

Halogen anion (AS/A2 generic)
is defined with respect to the entities below:
The entities below are defined with respect to:
Halogen anion (AS/A2 generic)
Bromide ion

Chloride ion

Fluoride ion

Iodide ion

chemical compound molecule metal molecular science reaction mechanism ionic material acid base geometry reactivity synthesis science knowledge chemistry Lewis