Group 7 (halogens)

Question 1

where are halogens found

Answer 1

group 7

Question 2

what are halogens

Answer 2

All of them are non-metals with coloured vapours

Question 3

properties of fluorine

Answer 3

very reactive, poisonous yellow gas

Question 4

properties of chlorine

Answer 4

fairly reactive, poisonous dense green gas

Question 5

properties of bromine

Answer 5

dense, poisonous, red-brown volatile liquid

Question 6

properties of iodine

Answer 6

dark grey crystalline solid or a purple vapour

Question 7

what happens as you go down group 7

Answer 7

become less reactive - it is harder to gain an extra electron, because the outer shells further from the nucleus.
Have higher melting and boiling points
have higher relative atomic masses

Question 8

how many electrons are on their outer shell

Answer 8

all have seven electrons on their outer shell.

Question 9

how can atoms share electrons

Answer 9

via covalent bonding with other non-metals so as to achieve a full outer shell

Question 10

what happens when halogens react with metals

Answer 10

form 1-ions called halides