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322
Aristotle
Only 5 elements, viewed as a divine substance. -
370
Democritus
"All matter is made up of tiny pieces". Atoms cannot be created. -
Antoine Lavosier
Matter in reactions can be rearranged. -
John Dalton
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Sir JJ Thompson
Fundamental units were 1000 times smaller than an atom. -
Sir Earnest Rutherford
-Alpha, Beta rays -Radioactive decay -
Neils Bohr
Proposed a theory of a hydrogen atom. -
Robert Millikan
Measured the charge of a single electron -
Albert Einstein
Release of atomic energy and develeoped theory of relativity. -
Aufbav Principle
Electrons will fill the lowest part of the shell. -
Friedrich Hund
Known for atoms molecules -
Erwin Schrodinger
Discovered the wave equation -
Otto Hahn, Lise Meitner, and Fritz Strassmann
Helped develop nuclear weapons and energy -
James Chadwick
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Wolgang Pauli
Made lots of discoveries in physics