Chem chapter 2 scientists

J.J. Berzelius

Credited for creating modern symbols for elements

Democritus

Greek philosopher who coined ‘atomos’, thought that matter was made of indivisible particles

John Dalton

Created third law of atomic theory: that when two elements can form multiple compounds, the ratio of masses remain constant for each compound

J.J. Thomson

Discovered that atoms are made of particles, experimented with the cathode ray tube, proved that atoms are not indivisible, thought atoms were like plum pudding

Robert Millikan

determined the charge of the electron with his oil drop experiment

Ernest Rutherford

used alpha particles to discover the positive nucleus, performed the gold foil experiment, proposed planetary model

Neils Bohr

proposed the Bohr model, where electrons uncertainly orbit the positively charged nucleus

Willard Libby

Developed the process of radiocarbon dating

Proust

Created law of definite proportions