| Term | Definition |
|---|
| discovered the neutron | chadwick |
| discovered the electron | thompson |
| employed the gold foil experiment | rutherford |
| first proposed the idea of atoms | deoctirus and lucipius |
| arranged the periodic table by atomic mass | mendelev |
| arranged the periodic table by atmoic number | mosley |
| used a cathode ray tube to make his discovery | thompson |
| law of definite proportions | proust |
| law of multiple proportions | dalton |
| law of conservation of mass | lebasie |
| proposed that matter was made up of 4 elements | aristotle |
| proposed the planetery model | bohr |
| proposed the atom was made of mostly empty space with a dense positive charge and nucleus in the center | rutherford |
| discovered the proton | goldstein |
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