atomic theory

By Cole wright
  • 500 BCE

    The Alchemist

    The Alchemist
    They thought that they could turn any object into gold, but they did help people understand atoms better
  • 400 BCE

    Democritus

    Democritus
    He discovered the atomic theory that Liquid atoms are smooth and the solid are ruff.
  • 350 BCE

    Plato

    Plato
    He introduced the atomic theory in which ideas of geometric forms serve as atoms.

  • Robert Boyle

    Robert Boyle
    He discovered that atoms must exist based on the relationship between pressure and volume.

  • Antone Lavoisier

    Antone Lavoisier
    He found out the law of conservation that states that matter can neither be created nor destroyed.

  • Billard ball model

    Billard ball model
    This is a model in which invisible molecules make up an atom. this was theorized by John Dalton

  • John Dalton

    John Dalton
    The total pressure of a mixture a gas amounted to the sum of the particles pressure that each individual exerted while they occupied the same space. Created the Billard ball model.

  • Amadeo Avagadro

    Amadeo Avagadro
    He found out that elements could exist as molecules.

  • Dmitri Mendeleev

    Dmitri Mendeleev
    He created the first periodic table and told people there were more elements

  • JJ Thompson

    JJ Thompson
    He discovered the electrons in an atom which helped many other scientists.

  • Pierre and Marie Curie

    Pierre and Marie Curie
    they discovered that radioactivity made atoms break down.

  • Plum pudding

    Plum pudding
    it is electrons surrounded by a volume of positive charge. found out by JJ Thompson.

  • Albert Eistein

    Albert Eistein
    He mathematically figured out that atoms were real and created the mass equivalent formula which helped create atomic bombs.

  • Robert Millikan

    Robert Millikan
    He found out that electrons were negatively charged

  • Ernest Rutherford

    Ernest Rutherford
    He created a type of the solar system model

  • Neils Bohr

    Neils Bohr
    He discovered that the electrons are moving around the nucleus, and it looks like the solar system.

  • solar system model

    solar system model
    This is a model which the electrons circle the nucleus like a solar system. discovered by Bohr and Rutheroford.

  • Henry G.J Mosely

    Henry G.J Mosely
    He created the atomic number which shows the number of positive charges.

  • Heisenberg

    Heisenberg
    He found out that the electrons go in a random movement around the nucleus.

  • Erwin schrodinger

    Erwin schrodinger
    He found out about the electron cloud created by the electrons.

  • Electron cloud model

    Electron cloud model
    It is when the electrons are surrounding the atom in a cloud. discovered by Erwin Schrodinger.

  • James Chadwick

    James Chadwick
    He discovered the neutron in the atom.