15488. In natural uranium, the constituents of three naturally occuring isotopes are September 13, 2025 by Admin U234 = 0.006%, U235 = 0.712% and U238 = 99.282% U234 = 0.712%, U235 = 0.006% and U238 = 99.282% U234 = 99.282%, U235 = 0.006% and U238 = 0.712% U234 = 0.006%, U235 = ✅ The correct answer is option A.