The first (\(\Delta_{\mathrm{H_1}}\)) and second (\(\Delta_{\mathrm{H_2}}\)) ionization enthalpies (in kJ mol-1) and the electron gain enthalpy (\(\Delta_{\mathrm{eg}}H\)) (in kJ mol-1) of the elements I, II, III, IV and V are given below. The most reactive metal and the least reactive non-metal of these are respectively Element I: \(\Delta_{\mathrm{H_1}}\)=520, \(\Delta_{\mathrm{H_2}}\)=7300, \(\Delta_{\mathrm{eg}}H\)=-60 Element II: \(\Delta_{\mathrm{H_1}}\)=419, \(\Delta_{\mathrm{H_2}}\)=3051, \(\Delta_{\mathrm{eg}}H\)=-48 Element III: \(\Delta_{\mathrm{H_1}}\)=1681, \(\Delta_{\mathrm{H_2}}\)=3374, \(\Delta_{\mathrm{eg}}H\)=-328 Element IV: \(\Delta_{\mathrm{H_1}}\)=1008, \(\Delta_{\mathrm{H_2}}\)=1846, \(\Delta_{\mathrm{eg}}H\)=-295 Element V: \(\Delta_{\mathrm{H_1}}\)=2372, \(\Delta_{\mathrm{H_2}}\)=5251, \(\Delta_{\mathrm{eg}}H\)=+48