Question Answer
Idea if an atom Democritus
Lavoisier Law of conservation of mass
John Dalton Atomic theory
JJ Thomson Plum pudding/cathode ray tube/discovered electrons
Ernest Rutherford Gold foil
Niels Bohr Bohr model
Schrodinger Electron cloud
James Chadwick Neutrons
Atomic number #protons or #electrons
Law of definite proportions Regardless of the sample size, compounds will have the same ratio of element
Law of multiple proportions Different compounds can be made of the same elements, but the ratio of each element will be different
Chem 3

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