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S.D

By missnicholls2016

  • electron?

    Discovery of electrons. During the 1880s and '90s scientists searched cathode rays for the carrier of the electrical properties in matter.J.J. Thomson

  • the atom

    Scientists who discovered atoms. John Dalton.

  • proton of an atom

    The word proton is Greek for "first", and this name was given to the hydrogen nucleus by Ernest Rutherford in 1920.