Halogens
- Group VII elements are known as Halogens
- They are non-metals
- They are poisonous
- Melting point and Boiling point will increase as it goes down the group because the size increases, meaning an increase in the strength of the Van der Wall forces holding them together, causing a higher temperature to be needed to break them
- Colour goes darker as it goes down the group
- Less reactive as it goes down the group because the bigger the atom, the smaller attraction between the nucleus and incoming electron
- All have similar properties because they all have seven electrons in the outer shell
- Reacts with metals to form ionic compounds, containing halide ions
- A more reactive halogen will displace a less reactive one from solution