-
Joseph Proust
law of definite proportions -
John Dalton
discovers atoms -
J. L. Gay-Lussac
the gas volume will increase as the temperature rises as long as the mass and pressure of the gases are kept consistent -
Amadeo Avagadro
gases are made up of atoms and can be accounted for -
JJ Thompson
electron discovery
plumb pudding model
isotopes- chemically similar, but different in mass
2 kinds of neon -
Max Planck
introduced hypothesis that oscellating atoms absorb and emit energy -
Robert Millikan
measured charge on single atom
oil-drop experiment -
Lord Rutherford
charge of electron is negative
photoelectric effect -
Niels Bohr
found out that atoms have 2 states, excited and ground -
Max Born
definition of quantity of heat -
Louis de Broglie
electron waves theory -
Erwin Schrodinger
atoms organized through electric clouds instead of power level -
Werner Heisenberg
uncertainty principle -
Walter Bothe
momentum and energy are conserved at atomic level
cosmic rays consist of massive particles -
Wolfgang Pauli
energy and momentum lost when electron is expelled from the nucleus -
James Chadwick
discovered neutron