Atomic theory

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Democritus

492 B.C.

Democritus discovered and theorized atoms. Which he says indivisible and, lies in between atoms is space.

Aristotle

332 B.C.

Aristotle was a student of Plato, His theory was about how matter is made of 5 elements Fire, Water, Air. Earth, Aether.

John Dalton

1700

John Dalton was a school teacher in England. Bases on all of his experiments: 1 all elements are composed of submicroscopic indivisible.

J.J. Thomson

1800

J.J. Thomson was know for his experiments. the most important one he made a Cathode Ray Tube.. which he found out that that electrons are negative.

Robert Millikun

1900

Robert's theory was the the mass of an electron. Which he did the the oil drop experiment. the weight of a electron is 0.

Ernest Rutherford

1911

Ernest Rutherford was know for the Gold foil experiment. he want to see if the center of an atom was positive or or negative. he found out that the electrons bounce off the nuclues , which states the nucleus is positive.

Max Planch

1918

Max's theory is revolutionized human understanding of atomic theory. Also he won the a Noble Peace Priaze

Niels Borh

1922

Niels's theory was that electrons orbit the nucleus just like the plantes do to the sun.

Werner Heisenberg

1932

He was know for the creation of quantum mechanics. Which he won a Noble Peace Prize

James Chadwick

1945

Chadwick discovered the neutron. he recived the Noble Piece Prized.

Erwin Schrodinger

1950

He work with nucular energy. He fought for Germany in world war one .

Louis de Broglie

1960

Louis's theory was base on the matter of light. He also united the physics of energy and matter.