2.4- group 7-the halogens

Question 1

what are group 7 elements called

Answer 1

halogens

Question 2

what are halogens

Answer 2

a group of toxic non-metals that have coloured vapours

Question 3

name there properties

Answer 3

-low melting and boiling points which increase when going down the group
-poor conductors of heat and electricity

Question 4

do halogens react with metals

Answer 4

yes
-they gain 1 electron so form ions with a 1- charge

Question 5

will a more reactive halogen displace a less reactive halogen

Answer 5

yes

Question 6

does the reacitivity increase or decrease when going down the group

Answer 6

it decreases

Question 7

after a displacement reaction state the colour of a halide salt

Answer 7

colourless

Question 8

after a displacement reaction state the colour of a bromine water

Answer 8

orange

Question 9

after a displacement reaction state the colour of a chlorine

Answer 9

colourless

Question 10

after a displacement reaction state the colour of a iodine water

Answer 10

brown