Group 7 Flashcards
What are the first four elements in group 7?
fluorine, chloring, bromine, iodine
Equation when a metal reacts with a group 7 element
metal + halogen –> metal halide
Equation when a non metal reacts with a group 7 element
non metal + halogen –> non metal halide
hydrogen + fluorine =
hydrogen fluoride
sodium + chlorine =
sodium chloride
The reactivity of group 7….. as you go down the group
decreases
The melting and boiling points ….. ias you go down the group
increase
Halogens exist as
diatomic molecules, this means that they exist as pairs
Are the halogens coloured substances or not?
They are coloured substances
What colour is fluorine?
Toxic pale yellow gas
What colour is chlorine?
Toxic yellow-green gas
What colour is bromine?
red, brown liquid that turns into a red-brown gas
What colour is iodine?
Dark black grey solid that evaporates to form a purple gas
