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< Back Rutherfordium  SEE PERIODIC TABLE   SEE FULL ARTICLE Atomic Number 104 Atomic Symbol Rf Atomic Weight [261 amu] Group Transition, 4 Ground State Electron Configuration 5f14 6s2 6p6 6d2 6f2 Oxidation States +4 Selected Radioisotopes 257Rf, 258Rf, 259Rf Discovered by Researchers at Joint Nuclear Research Institute, Dubna, Russia, 1964. Also, Ghiorso, Nurma; Harris; K. A. Y. Eskola; P. L. Eskola, 1969

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