3.2.3 The halogens

Question 1

at room temperature and pressure what state and colour is fluorine

Answer 1

pale yellow gas

Question 2

at room temperature and pressure what state and colour is chlorine

Answer 2

pale green gas

Question 3

at room temperature and pressure what state and colour is bromine

Answer 3

red/brown liquid

Question 4

at room temperature and pressure what state and colour is iodine

Answer 4

grey/black solid

Question 5

how does mpt and bpt change as you go down group 7

Answer 5

both increase

Question 6

why does the mpt and bpt increase as you go down the group

Answer 6

more electrons and shells as you go down so more van der waals forces which require more energy to break

Question 7

what is electronegativity

Answer 7

the relative tendency of an atom to attract a pair of electrons in a covalent bond

Question 8

how does electronegativity change as you go down grp 7 and why

Answer 8

become less electronegative as you go down because there is more distance and shielding between the nucleus and the outer electrons and the forces of attraction are less as you go down

Question 9

which of the halogens is the most reactive and best oxidising agent

Answer 9

fluorine

Question 10

how does reactivity of the halogens change down the group

Answer 10

decreases