4.2.1 - group 7 elements

Question 1

what are group 7 elements also called

Answer 1

halogens

Question 2

what type of bonding happens between halogens

Answer 2

covalent bonding

Question 3

what type of substances are halogens

Answer 3

simple molecular

Question 4

are all halogens diatomic?

Answer 4

yes

Question 5

what happens to the colours are you move down the group?

Answer 5

colours get darker

Question 6

what happens to the MP/BP down the group

Answer 6

MP/BP increases down the group

Question 7

fluorine colour and state

Answer 7

very pale yellow gas

Question 8

chlorine colour and state

Answer 8

pale green gas

Question 9

bromine colour and state

Answer 9

brown liquid

Question 10

iodine colour and state

Answer 10

dark grey solid

Question 11

astatine colour and state

Answer 11

black solid

Question 12

what do halogens form when they react with metals?

Answer 12

ionic compounds

Question 13

do halogens get more or less reactive down the group?

Answer 13

less

Question 14

why do halogens get less reactive as you move down the group?

Answer 14

• atoms have more electron shells
• the outer electron is further from the nucleus
• so the attraction between the outer shell electron and the nucleus is weaker

Question 15

what is the chemical test for chlorine?

Answer 15

damp blue litmus paper
-> turns white if chlorine is present