(a(i))[2]
Complete the table by estimating: • the boiling point of iodine • the density of bromine.
(a(ii))[1]
Describe the pattern shown by the melting points of the halogens as you go down Group VII.
(b(i))[1]
Deduce the electronic structure of chlorine. Use the Periodic Table as a guide.
(b(ii))[1]
Explain why a bromide ion has a charge of $1-$.
(c)[2]
Complete the word equation for the reaction shown. sodium astatide + chlorine → [BLANK] + [BLANK]
(d)[2]
Describe how to find the pH of an acidic solution without using a pH meter.