Abstract: The point value δ_i of Randic topological index was modified and topological index ^mE of valence electron orbit energy was thereby formed for predicting physicochemical properties of inorganic compounds. Utilizing their zero and first order index correlating to pKa₁ of inorganic hydrides, lattice energy, enthalpy of formation, hydrated energy and nuclear distance, several regression equations were suggested. Their related coefficient (index) is 0.994 4(0.995 8),0.996 7(0.997 1), 0.981 6(0.981 6), 0.979 1(0.979 5) and 0.995 3 (0.995 3), respectively, which showed that the results meet the good and excellent standards.