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400
Democritus
Democritus: 400 B.C.E
He came up with a theory that anything can be broken down in to smaller peices.He called these things atoms.Aristotle thought his theory was wrong. Since he was Aristotle many people believed him. -
400
Aristotle
Aristotle: 400 B.C.E.
He believed that Democritus theory was wrong and that every thing is made up of four elements. Those four elements are air, earth, water, and fire. Everyone thought he was correct over Democritus. -
John Dalton
He came up with the atomic theory. meaning the smallest unit in existance. The believed Democitis was correct. And a atom looks like a ball. -
Antoine Lavoisier
Antoine lavoisier
Antoine Lavosier discovered the law of conservation of mass. This means mass can't be created or destroyed. -
Henri Becquerel
Discoved raditactivity and uranium procuced x rays radation. Also that Atoms can't be shaped. -
J.J Thomson
He disovered th electron. -
Max Planck
Max Planck found the quantom theory witch states that how light is absorbed. -
Marie and Pierre Curie
Marie and Pierre Curie
They discovered 2 elements,
Oe was poloium
The other was radium -
Robert Millikan
Robert Millikan Responcible for finding the charge of a singal electron and proved subatonic particles exiest. -
Ernest Rutherford
Ernest Rutherford he discovered he neutron and had a theory that there was a positive neculous and was sorounded by negative feild. -
Niels Bhor
Niels Bhor made a theory that stated that electrons on the outside and neutrons obiting the neuclus. -
Henry Moseley
Henry Mosely came up with the relations between wavelenghts and X-rays produced and atomic mass between metals. -
Erwrin Schrodinger
Erwrin Schrodinger He came up with the equation between quntian wave macanics. -
Werner Heisenberg
Werner Heisenberg came up the uncertainly princible. That is you can't mease current possion of a particle and where it will move. -
James Chadwick
James Chadwick found the exisatnce of neutrons because another partical was found in an atom.
