jasonkummerperiod9

By invitingrobin
  • 460 BCE

    democritus

    democritus
    Democritus was an Ancient Greek pre-Socratic philosopher from Abdera, primarily remembered today for his formulation of an atomic theory of the universe. None of his work has survived.
  • 429 BCE

    plato

    plato
    he was a ancient Greek philosopher
  • 384 BCE

    airistotle

    airistotle
    he is known for rejecting platos theory

  • the alchemists

    the alchemists
    The alchemists began examining the atomic theory about two centuries after the death of Aristotle

  • robert boyle

    robert boyle
    he was a Irish natural philosopher, chemist, physicist, alchemist and inventor.

  • john dalton

    john dalton
    he made atomic models.

  • mendeleev's pd table

    mendeleev's pd table
    Dmitri Ivanovich Mendeleev was a Russian chemist and inventor. He is best known for formulating the Periodic Law and creating a version of the periodic table of elements.

  • newlands law of octaves

    newlands law of octaves
    chemicals are arranged by weight.

  • robert millikan

    robert millikan
    Robert Andrews Millikan was an American experimental physicist who won the Nobel Prize for Physics in 1923 for the measurement of the elementary electric charge and for his work on the photoelectric effect. Millikan graduated from Oberlin College in 1891 and obtained his doctorate at Columbia University in 1895

  • photoelectric effect

    photoelectric effect
    how light reacts another electrical discharge

  • discovery of radioactivity

    discovery of radioactivity
    Henri Becquerel is who discovered radioactivity

  • plancks quantum theory

    plancks quantum theory
    Different atoms and molecules can emit or absorb energy in discrete quantities only.

  • plum pudding model

    plum pudding model
    electrons in uniform spheres

  • Ruthford's gold foil experiment

    Ruthford's gold foil experiment
    he found out atoms are Mosty empty space.

  • bohr's planetary model

    bohr's planetary model
    a model of how electrons orbit the nucleus.

  • mosley atomic numbers

    mosley atomic numbers
    1914 Moseley published a paper in which he concluded that the atomic number is the number of positive charges in the atomic nucleus. He also stated that there were three unknown elements,

  • discovery of the proton

    discovery of the proton
    Ernest Rutherford discovered the proton.

  • schrodinger equation

    schrodinger equation
    Erwin Schrödinger formulated a wave equation that accurately calculated the energy levels of electrons in atoms

  • heisenberg uncertainty principle

    heisenberg uncertainty principle
    we don't know the speed of a partial like a proton or an electron.

  • discovery of the neutron

    discovery of the neutron
    James Chadwick discovered neutrons.