Halogens Flashcards
chlorine (g) colour
pale green
bromine (l)
colour
orange liquid
iodine (s)
dark grey solid
bromine colour when a gas
dark brown
iodine as a gas
purple gas
they are diatomic
meaning?
whenever we write these gases, write with a ^2
melt and boiling point as go down
get higher
reactivity as go down group
less reactive
chlorine, bromine and iodine
colour change in potassium chloride
no reaction
chlorine reaction with potassium bromite solution
yellow/orange colour of bromine appears
bromine reaction with potassium bromide
none
iodine reaction with P Bromide
none
chlorine reaction with P iodine
brown colour of iodine
bromine reaction with P iodine
darkens from yellow/orange to brown
iodine reaction with P iodine
none
fine cupboard
fumes sucked in and are filtered to remove harmful chemicals
what is let out of a fume cupboard
technically just air
keeps scientists safe
why are goggles used as a safety precaution?
no gas gets into eyes
why do they become less reactive down the group
the outer electron shell is further away from the influence of the nucleus, so an electron is gained less easily
