Question 12 – Properties of Period 3 elements and their oxides (A-level only) - Questions

This question is about periodicity, the Period 3 elements and their compounds.

Define the term periodicity as applied to the elements in the Periodic Table.

Identify the element in Period 3 with the highest electronegativity value.

Identify the element in Period 3 with the largest atomic radius. Explain your answer.

The equations for two reactions of aluminium oxide are shown:

\text{Al}_2\text{O}_3 + 6\text{HCl} \rightarrow 2\text{AlCl}_3 + 3\text{H}_2\text{O}

\text{Al}_2\text{O}_3 + 2\text{NaOH} + 3\text{H}_2\text{O} \rightarrow 2\text{NaAl(OH)}_4

Name the property of aluminium oxide that describes its ability to react in these two ways.

Complete and balance the equation for the formation of phosphine ( $PH3\text{PH}_3$ ) from phosphorus(III) oxide.

\text{P}_2\text{O}_3 + \underline{\quad}\text{Zn} + \underline{\quad}\text{HNO}_3 \rightarrow \underline{\quad}\text{PH}_3 + \underline{\quad}\text{Zn(NO}_3)_2 + \underline{\quad}\text{H}_2\text{O}