At a rally on Sunday, the New York State Federation of Taxi Drivers union asked for the Taxi and Limousine Commission to issue emergency placards to cab drivers as one solution. The placards would ...

When chlorine (as a gas or dissolved in water) is added to sodium bromide solution, the chlorine takes the place of the bromine. Because chlorine is more reactive than bromine, it displaces ...

This table summarises some of the properties and uses of three halogens: ...