Group 7

Question 1

What are the halogens colour in nature

Answer 1

F2 - yellow, very reactive
Cl2 - pale green, reactive, poisonous in large amounts
Br2 - red liquid with brown/orange fumes
I2 - shiny grey solid, purple gas

Question 2

Melting Point and boiling point of halogens down the group

Answer 2

Melting and boiling point decreases down the group as the atomic radii gets bigger, larger induced dipole dipole forces, harder to break the intermolecular forces