Halogens - chemistry

year 10

colour and state of iodine

colour = dark grey - state = solid ( purple crystals naturally and become a purple vapour when heated)

colour + state of bromine

colour - reddish/brown , state =liquid ,

chlorine - colour and state

pale green gas , choking smell

as you go down group 7 what can you observe?

colours get darker , the elements become less reactive , melting points increase, go from gas to liquids to solids