SC17b Group 7 Flashcards
1
Q
what are the group 7 gases called?
A
halogens
2
Q
appearance of chlorine?
A
green gas
3
Q
appearance of bromine?
A
brown liquid
4
Q
appearance of iodine?
A
purple / black solid
5
Q
test for chlorine?
A
damp blue litmus paper turns red then bleaches white
6
Q
halogens + metals →
A
salts which contain halides
7
Q
fluorine + sodium →
A
sodium fluoride
8
Q
pattern for group 7 element? boiling+melting points, atomic number, physical state and colour.
A
as you go down:
b + m points - increases
atomic num - increases
physical state - gas, liquid, solid
colour - gets darker
