Callie ann L p1

By clitz
  • 400 BCE

    Democritus

    Democritus
    Democritus was an Ancient Greek pre Socratic philosopher he discovered atoms!
  • 19

    Discovery of The Neutron

    Discovery of The Neutron
    In May 1932, James Chadwick discovered the neutron.

  • Lavoisier

    Lavoisier
    Antoine Laurent de Lavoisier was a French chemist who was central to the 18th-century chemical revolution. He discovered oxygen and silicon.

  • The Alchemists

    The Alchemists
    The Alchemist believed that every metal was formed by two principles, Mercury and sulfur.

  • John Dalton

    John Dalton
    John dalton had an atomic theory that all matter was comprised of indivisible and indestructible atoms. In 1808 John Dalton published his first chemical atomic theory.

  • Newland's Law of Octaves

    Newland's Law of Octaves
    Newland's law of octaves was made by the chemist J.A.R. Newland’s in 1864 where he arranged the elements

  • Mendeleev’s pd table

    Mendeleev’s pd table
    In 1869, Russian chemist Dmitri Mendeleev created the original periodic table but left gaps for the elements that were not yet discovered

  • Photoelectric effect

    Photoelectric effect
    The photoelectric effect is used to generate electricity with the help of solar panels. This was discovered by the physicist Heinrich Rudolf Hertz in 1887

  • Discovery of Radioactivity

    Discovery of Radioactivity
    In March 1, 1896 a man named Henri Becquerel discovered radioactivity. The first radioactive element to be discovered was uranium. Radioactivity is an unstable atomic nucleus.

  • Discovery of The Electron

    Discovery of The Electron
    Electrons were discovered by English physicist J.J Thomson in 1897.

  • Charge of the electron

    Charge of the electron
    Electron carries a negative charge

  • Plum Pudding Model

    Plum Pudding Model
    A Plum Pudding model is a scientific model of an atom it’s defined by electrons. Negative charged “plums” embedded in positive charged “pudding”. The Plum Pudding model was discovered by J.J Thomsom’s in 1904.

  • Planck’s Quantum Theory of Light

    Planck’s Quantum Theory of Light
    The theory was that light bulbs should be heated to a temperature of about 3,200 Kelvin to ensure that most of energy is emitted as visible waves. This was discovered by Max Planck in 1905.

  • Rutherford’s Gold Foil Experiment

    Rutherford’s Gold Foil Experiment
    Rutherford’s gold foil experiment is a piece of gold foil that is hit with a alpha particle. Founded in 1911 by Ernest Rutherford.

  • Bohrs planetary model

    Bohrs planetary model
    The Bohr’s Planetary is a structural model of an atom. By Niels Bohr in 1913

  • Mosley’s Atomic Number

    Mosley’s Atomic Number
    Moseley published a paper in 1914 that he included that an atomic number is a number with positive charges in the atomic nucleus.

  • Discovery of The Proton

    Discovery of The Proton
    A proton is a Positively charged particle. Founded in 1917 by Ernest Rutherford

  • Robert Millikan

    Robert Millikan
    Millikan was honored with the noble prize for physics in 1923. He won for the measurement of the elementary electric charge and for his work on the photoelectric effect.

  • Schrodinger Equation

    Schrodinger Equation
    This equation is a linear partial differential equation that governs the wave function of a quantum mechanical system. Founded by physicist Erwin Schrodinger in 1926.

  • Heisenburg uncertainty Principle

    Heisenburg uncertainty Principle
    The Heisenburg Uncertainty Principle was made by Werner Heisenburg in 1927. It’s a variety of mathematical equations with a limit to the accuracy