atomic model timeline

By 28NFlowers@johncooper.org
  • 430 BCE

    Plato

    Plato
    He suggested that everything os made up of small units. A fact is that Plato was a famous greek philosopher.
  • 370 BCE

    Democritus (460 BC - 370 BC)

    Democritus (460 BC - 370 BC)
    He proposed the concept of the atom as an indivisible particle.
  • 330 BCE

    Solar system model

    Solar system model
    Made my Niels Bohr explaining how things orbit.
  • 1400

    The Alchemists (476 A.D - 1400)

    The Alchemists (476 A.D - 1400)
    They were the first people to isolate certain metals. What we know now to be elements.

  • Robert Boyle

    Robert Boyle
    He is known for the Boyle law, about the relationship between the pressure and volume of gas.

  • Antone Lavoisier

    Antone Lavoisier
    He defined and named oxygen and hydrogen as elements. He also developed the law of conservation of mass and the law of definite proportions.

  • Billiard Ball model

    Billiard Ball model
    This was made by John Dalton this was the earliest atomic model.

  • John Dalton

    John Dalton
    He developed the atomic theory. He also proposed that elements are composed of individual atoms.

  • Amedeo Avogadro

    Amedeo Avogadro
    He established a relationship between the number of particles in a gas. The fact is he was an Italian scientist.

  • Dmitri Mendeleev

    Dmitri Mendeleev
    He created the periodic table. A fact is he was a Russian chemist.

  • JJ Tompson

    JJ Tompson
    He discovered the electron. A fact is that he received the noble prise in 1906.

  • Pierre and Marie Curie

    Pierre and Marie Curie
    They discovered two radioactive chemicals, radium and Polonium. A fact is that Marie was the first woman who won two different noble prizes.

  • Plum Pudding model

    Plum Pudding model
    Made by JJ Tompson, it introduced subatomic particles

  • Albert Einstein

    Albert Einstein
    He formulated the equation e=mc^2, which helped the world understand science more.

  • Robert Millikan

    Robert Millikan
    He determined the charge of the electron and allowed for the calculation of this mass.

  • Ernest Rutherford

    Ernest Rutherford
    He discovered that atoms have a nucleus. A fact is that he is from New Zealand

  • Neils Bohr

    Neils Bohr
    He proposed an idea for the model of an atom.

  • Henry G. J. Mosely

    Henry G. J. Mosely
    He reorganized the periodic table based on atomic numbers. A fact is that he died in World War I.

  • Erwin Schrödinger

    Erwin Schrödinger
    We developed an equation. The fact is he was an Austrian physicist.

  • Electron Cloud model

    Electron Cloud model
    This was the most popular model of the atom.

  • James Chadwich

    James Chadwich
    He discovered the neutron. A fact is he won a noble prize in 1935 for his work.