4.3 HALOGENS Flashcards
What group are the halogens in
7
Why does the melting/boiling point of the halogens increase as you go down the group
- The molecules become larger
- So the intermolecular forces become stronger
- More energy is needed to overcome these intermolecular forces.
What is special about all the halogens molecular formular
They are all diatomic (have a 2 e.g Br2)
What type of structure are the halogens
Simple molecular substances, covalently bonded
What happens to the trend of colours of the halogens as you go down the group
They get darker as you go down
Formula, colour and state of fluorine
- F2
- Very Pale Yellow
- Gas
Formula, colour and state of Chlorine
- C2
- Pale Green
- Gas
Formula, colour and state of Bromine
- Br2
- Orange
- Liquid
Formula, colour and state of Iodine
- I2
- Dark Grey
- Solid
Formula, colour and state of Astatine
- At2
- Black
- Solid
What halogen is volatile
Bromine
What does iodine do easily
Sublime
What fumes does iodine release
Purple
What fumes does bromine release
Orange
When a halogen reacts with a metal, what compound is formed and how is it a redox reaction
An ionic compound. The halogen becomes reduced as it gains an electron, and the metal becomes oxidised as it loses an electron(s)
Define Halide Formation
When a halogen reacts with another substance, gains an electron and becomes a negative ion