halogens Flashcards
1
Q
the reactivity of halogens (7)
A
they all have 7 electrons on the outer shells
as you go down the group, the outer shell electrons get further from the nucleus
- this determines how reactive the halogen will be
2
Q
pattern in physical properties
A
goes from gas to liquid to solid down the group
melting and boiling points increase as you go down
3
Q
chemical test for chlorine:
A
when damp litmus paper is put into chlorine gas it turns red then bleaches white (if chlorine is present)
4
Q
describe chlorine:
A
pale green
a gas
5
Q
describe bromine:
A
red/brown
a liquid
6
Q
describe iodine:
A
grey (black at room temp)
a solid
