How many core electrons are present in potassium. (atomic no = 19 ).

Explanation

The standard electrode potential `(E^(@))` which measures the reducing power represent here the overall change from M(s) to `M^(+)(aq)`. `E^(@)` value depends upon three factors/parameters i.e.,, sublimation ionization and hydration enthalpies. With the small size of its ions Li has the highest hydration enthalpy which account for its highest negative `E^(@)` value and its reducing power.