Fantasy author (1948-2015). A Knight Bachelor (i.e. Sir Terry Pratchett OBE), he’s been described as the most shoplifted author in Britain (belying an American critic who once claimed that he hadn’t found his audience).
The word “halogen” means “salt former” or “salt maker”. When halogens react with metals, they produce a wide range of salts, including calcium fluoride, sodium chloride (common table salt), silver bromide and potassium iodide.