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history of an atom
major discoveries and experiments made by principal scientist
Term | Definition |
---|---|
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 |