Atomic Theory History

Who created the billiard model for the atom

James Dalton

Who discovered the proton and the nucleus

Ernest Rutherford

Who conducted the gold foil experiment with alpha particles

Ernest Rutherford

Who had the model with the nucleus but no reasoning for orbits -NUCLEAR MODEL

Ernest Rutherford

Who discovered the electrom

JJ Thompson

Who discovered the Neutron

J. Chadwick

Who discovered the mass and charge of electron

R. Millikan

Who conducted the Cathode Ray Tube Experiment

JJ Thompson

Who created the quantum mechanical model of the atom

E Schrodinger

Who created the plum pudding model of atom, with electrons scattered throughout a spherical cloud of positive charge

JJ Thompson

Who created the planetary model of atom with fixed orbits

Niels Bohr

Who discovered polonium and coined the term radioactive decay

Marie and Pierre Curie

Who conducted the oil drop experiment

R. Millikan

Who obtained the charge-to-mass ratio for both proton and electron

JJ Thompson

Who deduced Law of Definite Proportions

J Dalton

Who deduced Law of conservation of mass

J Dalton

Who deduced law of multiple proportions

J Dalton

Who discovered mass of an electron

R Millikan

What does “quantized “ mean

visibly separated

Formula for energy of a photon

h-plancks constant x v-frequency

Formula for speed

c=wavelength x frequency