History of the atom

  • Democritus
    400 BCE

    Democritus

    He believed the atom was unchangeable, industructible and always existed
  • Plato
    355 BCE

    Plato

    He found that geometric forms serve as atoms
  • The Alchemists
    122 BCE

    The Alchemists

    They expiremented with metals to change their atomic structure to become more valuable
  • Robert Boyle

    Robert Boyle

    He made the law of gases. The law of gases states that gases stay the same with constant temperature.
  • Solar system model

    Solar system model

    Shows how atoms make up the univers
  • Antoine Lavoisier

    Antoine Lavoisier

    He found that by combining Phosphorus and Sulfur with air they gained weight.
  • John Dalton

    John Dalton

    He described that all matter was made up of atoms for the first time.
  • Billiard Ball model

    Billiard Ball model

    The balls were examples of atoms in a greater size
  • Amedeo Avogadro

    Amedeo Avogadro

    He stated the relationship between the masses was the same volume of gases.
  • JJ Thompson

    JJ Thompson

    He thought that atoms were made of small particles
  • Electron cloud model

    Electron cloud model

    It locates electrons in the atom
  • Plum Pudding model

    Plum Pudding model

    It reveals the nucleus in the atom
  • Dmitri Mendeleev

    Dmitri Mendeleev

    He created the periodic table
  • Albert Einstein

    Albert Einstein

    He theorized that the atom could be split and was proven by Oppenheimer
  • Niels Bohr

    Niels Bohr

    He had the idea that an atom is a small positively charged nucleus
  • Robert Millikan

    Robert Millikan

    He discovered the value of the electric charge in a electron
  • Werner Heisenberg

    Werner Heisenberg

    He formulated quantum mechanics in terms of matrices
  • Pierre and Marie Curie

    Pierre and Marie Curie

    Both found radioactivity in many elements
  • Erwin Shrodinger

    Erwin Shrodinger

    He found the wave equation for electron movements
  • James Chadwick

    James Chadwick

    He found neutrons inside the atoms