Isotope 01
Isotope 01 : One of two or more atomic species of an element differing in atomic weight but having the same atomic number. Each contains the same number of protons but a different number of neutrons. Uranium-238 contains 92 protons and 146 neutrons; the isotope U-235 contains 92 protons and 143 neutrons. Thus the atomic weight (atomic mass) of U-238 is 3 higher than that of U-235. See also Radioisotope
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