Atoms and the Periodic Table

  • Period: to

    Atomic Theory

    Years are correct, dates are incorrect and unknown.
  • John Dalton

    His theory stated that all matter is made up of atoms. (Date unknown, random date used, year is correct)
  • J.J. Thomson

    Atoms have electrons, negatively charged.
  • Ernest Rutherford

    That atoms have a nucleus, the positively charged particles are called Protons.

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