Chemistry - PERIODIC TABLE Question with Solution | TestHub

Write the number of pairs in which size of first element or ion is higher as compared to second out of following nine pairs- $(\mathrm{O},\mathrm{S}),(\mathrm{He},\mathrm{Ne}),(\mathrm{Kr},\mathrm{Ne}),\left(\mathrm{Na},{\mathrm{Na}}^{+}\right),\left(\mathrm{Cl},{\mathrm{Cl}}^{-}\right),\left({\mathrm{I}}^{-},{\mathrm{Cl}}^{-}\right),\left({\mathrm{Li}}^{+}{}_{\mathrm{aq}},{\mathrm{Na}}^{+}{}_{\mathrm{aq}}\right),(\mathrm{Li},\mathrm{Na}),\left({\mathrm{Li}}^{+},{\mathrm{Na}}^{+}\right)$