This question is about periodicity, the Period 3 elements and their compounds.
State what is meant by the term periodicity.
Identify the element in Period 3 with the highest first ionisation energy.
Identify the element in Period 3 (excluding Argon) with the smallest atomic radius. Explain your answer.
Aluminium oxide is an oxide of a Period 3 element that can react with both hydrochloric acid and aqueous sodium hydroxide. State the term used to describe this chemical behavior of aluminium oxide.
Complete and balance the equation for the reaction of chlorine with hot, concentrated sodium hydroxide solution. 3Cl2+‾NaOH→‾NaCl+‾NaClO3+‾H2O3\text{Cl}_2 + \underline{\quad}\text{NaOH} \rightarrow \underline{\quad}\text{NaCl} + \underline{\quad}\text{NaClO}_3 + \underline{\quad}\text{H}_2\text{O}3Cl2+NaOH→NaCl+NaClO3+H2O