Group 7 (Halogens)

What type of molecules do the halogens form?

Diatomic molecules (two molecules)

What happens to group 7 metals as you go down the group

The melting and boiling point increases

At room temperature, what is Chlorine

Green gas, poisonous and fairly reactive

At room temperature, what is bromine

Poisonous, red-brown liquid

At room temperature, what is Iodine

Dark grey crystalised solid

How to test for chlorine

Hold a damp blue litmus paper over the gas
If chlorine is present, it will bleach the litmus paper white

What happens as you go down group 7 (reactivity)

Reactivity decreases

Why does reactivity decrease as you go down

Attracting an electron is harder since the outer shell is further away from the nucleus

What is produced when Halogens react with metals

Metal halide

What is produced when a Halogen reacts with hydrogen

Hydrogen halide