$($b$)$

$($i$)$ Write balanced chemical equations

showing the reactions of the oxides of $Na$ and $Mg$ with hydrochloric acid $(HCl).$

$($ii$)$ Write balanced chemical equations:$-$

$",$ showing the reactions of all the oxides of $P$ and $S$ with sodium hydroxide $(NaOH).$

Question $4$

AC $1\mathrm{.}5$

Describe the trend in acid $-$ base behaviour of the Period $3$ oxides based on the above reactions, moving from left to right across the Period.