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Atomic theory Timeline

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    Atomic Theory

  • John Dalton

    John Dalton

    Name - John Dalton
    Year/s he worked - 1803
    Nationality - English
    His contributions - Introducing the atomic theory to chemistry
  • Frederick Soddy

    Frederick Soddy

  • Jams Chadwick

    Jams Chadwick

  • JJ Thomson

    JJ Thomson

    Name - Joseph john Thomson
    year/s He worked - 1897
    Nationality - Scottish
    His contribution - experiments with cathode ray tubes showed that all atoms contain tiny negatively charged subatomic particles or electrons
  • ernest Rutherford

    ernest Rutherford

    Name - Ernest Rutherford
    Years he worked - 1907
    Nationality - New zealand
    Contribution - He found that the atom is mostly empty space, with almost all its mass concentrated at the central nucleas
  • Henri Becquerel

    Henri Becquerel

  • Leo Cartwright

    Leo Cartwright

    Leo discovered that the atom is really small