Paper 1 May/June 2016 CHEMISTRY (9701/11) IGCSE
In reactions 1 and 2, X represents an element in Period 3.
In each reaction, X is forming a product where X is in its highest oxidation state.
$reaction{\text{ }}1\,\,\,chlorine + element\,X \to {X_y}C{l_z}$
$reaction\,2\,\,\,oxygen + element{\text{ }}X \to {X_p}{O_q}$
Which ratios show a steady increase from sodium to phosphorus?