The first $\left({\mathrm{\Delta }}_{\mathrm{i}}{\mathrm{H}}_1\right)\text{ and second }\left({\mathrm{\Delta }}_{\mathrm{i}}{\mathrm{H}}_2\right)$ionization enthalpies $\left(\text{ in }\mathrm{kJ}{\mathrm{mol}}^{-1}\right.\text{ ) }$and the electron gain enthalpy $\left({\mathrm{\Delta }}_{\mathrm{eg}}\mathbf{H}\right)$ $\left(\text{ in }\mathrm{kJ}{\mathrm{mol}}^{-1}\right)$of the elements I, II, III, [V and V are given below:
 

Element	${\mathrm{\Delta }}_{\mathbf{i}}{\mathbf{H}}_{\mathbf{1}}$	${\mathrm{\Delta }}_{\mathbf{i}}{\mathbf{H}}_2$	${\mathrm{\Delta }}_{\mathrm{eg}}\mathbf{H}$
I	520	7300	-60
II	419	3051	-48
III	1681	3374	-328
IV	1008	1846	-295
V	2372	5251	+48

The most reactive metal and the least reactive non-metal of 7 E these are respectively