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Democritus. b. 460 BC Greek philosopher “atoms”. Aristotle. b. 384 BC Greek philosopher 4 elements. John Dalton. b. 1766 English scientist Billiard ball model – each element is distinct. J.J. Thompson. b. 1856 English physicist Raisin bread model of the atom. Ernest Rutherford.
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Democritus • b. 460 BC • Greek philosopher • “atoms”
Aristotle • b. 384 BC • Greek philosopher • 4 elements
John Dalton • b. 1766 • English scientist • Billiard ball model – each element is distinct
J.J. Thompson • b. 1856 • English physicist • Raisin bread model of the atom
Ernest Rutherford • b. 1871 • British chemist and physicist • Nuclear model
Niels Bohr • b. 1886 • Danish physicist • Electron shells