The Halogens Flashcards
Where are the halogens located?
Group 7.
Description of chlorine at room temperature.
A very pale green gas. This means it has a very low boiling point (it’s a gas at room temperature ffs)
Description of bromine at room temperature.
Orange/brown liquid. Low melting point.
Description of iodine at room temperature.
Silver/gray solid. Melting point is higher than room temperature.
The halogens exist as…
Diatomic molecules.
What is a displacement reaction?
When a more reactive element displaces a less reactive element from a compound.
What happens to the reactivity as you go down group 7?
The reactivity decreases as there are more electrons shells,meaning there is less attraction between the nucleus and outer most electrons. It is harder to gain an electron.
What happens to the melting and boiling points as you go down group 7?
The melting and boiling point increases down the group because molecules have more electrons and other for larger and so the intermolecular forces are stronger.
What happened to the colour of the halogens as you go down the group?
The colour of halogens get darker down the group and the melting point increases. For example fluorine is a yellow gas and astatine is a dark black solid.
