Complete the table with the formulae of stable oxides. Identify the element forming an amphoteric oxide. Write balanced equations for the reaction of BeO with NaOH and HCl.

i)
Complete the table with the formulae of the stable oxides:

Element	Formula of oxide
Na	$\text{Na}_2\text{O}$
Al	$\text{Al}_2\text{O}_3$
S	$\text{SO}_2$, $\text{SO}_3$
Cl	$\text{Cl}_2\text{O}$, $\text{Cl}_2\text{O}_7$

ii)
The element that forms an amphoteric oxide among the given options is Aluminum (Al). Its oxide, $\text{Al}_2\text{O}_3$, reacts with both acids and bases.

iii)
Write balanced equations showing the reaction of BeO with:

• $\text{NaOH}(aq)$: $$\text{BeO}(s) + 2\text{NaOH}(aq) + \text{H}_2\text{O}(l) \longrightarrow \text{Na}_2[\text{Be}(\text{OH})_4](aq)$$
• $\text{HCl}(aq)$: $$\text{BeO}(s) + 2\text{HCl}(aq) \longrightarrow \text{BeCl}_2(aq) + \text{H}_2\text{O}(l)$$