History of the atom theory

By anayakamile29
  • 460 BCE

    Democritus

    Democritus
    He was the one that developed the concept "atom",

  • Dalton's atomic model

    Dalton's atomic model
    He made the first atomic theory, also elements are made up of very small particles called atoms.

  • JJ Thomson

    JJ Thomson
    Discover of the electron, of isotopes and inventor of the mass spectrometer.

  • Ernest Rutherford

    Ernest Rutherford
    He show that atoms have "+" in the middle and that has many empty space between but also discovered the protons and nucleus.

  • Niels Bohr

    Niels Bohr
    Contributed to the understanding of the atom and quantum mechanics.

  • Edwin Schrodinger

    Edwin Schrodinger
    Schodinger used equations to described the like hood of finding an electron in certain position, also he described the electrons as waves with their probable location viewed as clouds.

  • James Chadwick

    James Chadwick
    Was the one that discovered the existence of neutrons and the neutral particle that share the nucleus with the charged proton.