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history of an atom

major discoveries and experiments made by principal scientist

Democritus discovery ATOM/ATOMUS
Democritus Description of atomic model Believed that matter is made up of atoms
Democritus experiment Cut something in half various times
Dalton atomic theory
Atomic theory 3 components -all elements are made up of atoms -all atoms of one element are identical -atoms cannot be created or destroyed
Dalton Description of atomic model Solid sphere model
JJ Thomson discovery there are particles smaller than an atom electron
jj thomson Description of atomic model Plum pudding
JJ Thomson experiment cathode ray tube
Robert Millikan Discovery charge and mass of an electron
Robert Millikan experiment oil drop experiment
ernest rutherford discovery discovered the nucleus
ernest ruhterford atomic model Nuclear model
ernest ruhterford experiment gold foil experiment
Niels bohr discovery electrons travel in energy levels orbit the nucleus
niels bohr atomic model Planetary model
Louisde brogile, heisenburg,schrodinger atomic model Quantum mechanical model
Louisde brogile, heisenburg,schrodinger discovery -electrons treated like waves And particles -electrons DO NOT travel on specific paths -there are ENERGY LEVELS asdifferent regions and each has its own shape
Created by: azonipseaa