Halogen heaters are radiant heaters. They utilise infrared radiation to work. The rods usually emit rays of heat that ...

The metals become more reactive as you go down the group. The elements in group 7 are known as halogens. Fluorine and chlorine are gases. Bromine is one of only two liquid elements. Iodine is solid.

The metals become more reactive as you go down the group. The elements in group 7 are known as halogens. Fluorine and chlorine are gases. Bromine is one of only two liquid elements. Iodine is solid.