(a(i))[3]
Fill in the table to infer the density of iodine, the melting point of astatine and the colour of astatine.
(a(ii))[1]
Explain why the density of chlorine at room temperature is much lower than the density of bromine and astatine at room temperature.
(a(iii))[1]
Describe the pattern in the boiling points of the halogens.
(b)[2]
Complete the word equation shown below.\n\nbromine + potassium iodide → [BLANK] + [BLANK]
(c)[2]
Calculate the relative molecular mass of $\text{C}_2\text{F}_4\text{Cl}_2$. Show all of your working. Use your Periodic Table as a guide.