UraniumNatural radioactive element with the atomic number 92. The n... in the isotopeAtoms of the same atomic number (i.e. the same chemical elem... composition occurring in nature, Natural uraniumNatural radioactive element with the atomic number 92. The n... is a mixture of uranium-238 (99.2739%), uranium-235 (0.7205%) and a very low percentage of uranium-234 (0.0056%).
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