(a(i))[3]
Fill in the table by predicting: • the melting point of chlorine • the density of liquid fluorine at its boiling point • the colour of astatine.
(a(ii))[2]
State the state of bromine at $0\,^{\circ}\text{C}$. Give an explanation.
(b)[2]
Complete the dot-and-cross diagram to display the electron arrangement in a molecule of chlorine. Show only the outer shell electrons.
(c(i))[1]
Describe how the number of nucleons changes during this decay.
(c(ii))[1]
One statement about isotopes is wrong. Tick the box that contains the incorrect statement.