halogens

Question 1

what are the trends in properties in halogens

Answer 1

• all diatomic
• colours get darker down group
• MP/BP increases down group

Question 2

state and colour of fluorine

Answer 2

very pale yellow
(g)

Question 3

state and colour of chlorine

Answer 3

pale green
(g)

Question 4

state and colour of bromine

Answer 4

brown
(l) - volatile

Question 5

state and colour of iodine

Answer 5

dark grey
(s) - sublimes

Question 6

state and colour of astatine

Answer 6

black
(s)

Question 7

what is reactivity like in halogens

Answer 7

less reactive down the group

Question 8

why does reactivity decrease down the group

Answer 8

• atoms have more electrons
• the extra electron is further from the nucleus
• so attraction to nucleus is weaker