Which statement is not correct about the trends in properties of the Period 3 elements (sodium to argon)?
Silicon has the highest melting point of the Period 3 elements.
The Cl−\text{Cl}^-Cl− ion has a larger ionic radius than the S2−\text{S}^{2-}S2− ion.
Sodium has the highest second ionisation energy of all the Period 3 elements.
Sulfur has a higher melting point than phosphorus.
37 exam-style questions on AQA A Level Chemistry Group 7(17), the halogens, covering Trends in properties and Uses of chlorine and chlorate(I). Each one has a worked solution and a mark scheme showing where the marks go.