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Rutherfordium is a chemical element with symbol Rf and atomic number 104, named in honor of physicist Ernest Rutherford.
7. Image: Thomas Edison. The history of electronics is a story of the twentieth century and three key componentsâthe vacuum tube, the transistor, and the integrated circuit. In 1883, Thomas Alva Edison discovered that electrons will flow from one metal conductor to another through a vacuum.mage: Multiple Radio Tuner of Marconi, 1907 â Marconi Collection of the da Vinci Museum, Milano, Italy. The first applications of electron tubes were in radio communications. Guglielmo Marconi pioneered the development of the wireless telegraph in 1896 and long-distance radio communication in 1901.