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12 Cards in this Set

  • Front
  • Back

Dalton

Hypothesis for existence of atoms and had the Atomic Theory

Thomson

Discovered the electron

Rutherford

Discovered the positively charged core of the atom

Chadwick

Discovered neutrons

Proust

Discovered the law of definite proportions

Democritus

Suggested the world was made of empty space and atoms

Millikan

Measured an electron's charge accurately

Einstein

Explained the origin of energy released during nuclear changes (e=mc^2)

Moseley

Discovered protons equal atomic mass

Bohr

Said energy is only transferred in certain well defined quantities

Planck

Discovered quantum theory and quanta

Avogadro

Avogadro's number, said equal volumes of the same gases at the same temperature and pressure contain equal numbers of molecules