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Rutherfordium is a chemical element with symbol Rf and atomic number 104, named in honor of physicist Ernest Rutherford.
Pierre and Marie Curie, French Physicists discovered two new elements emitting radiation, polonium on July 18, 1898. and radium in December of 1898. Marie Curie named the energy emitted from uranium and thorium as radioactivity. and also invented the first instrument to measure radioactivity.