• Antoine Lavoisier

    Antoine Lavoisier
    Lavoisier was a French Chemist who had concluded that combustion, or burning, is the chemical union of the burning substance with a gas that he named oxygen.
  • John Dalton 'Atomic Theory'

    John Dalton 'Atomic Theory'
    Dalton was a British Scientist whos theory proposed that all matter was made up of atoms and although the elements atoms were identical they had differing weight and mass.
  • J.J Thomson

    J.J Thomson
    J.J Thomson discoverd that atoms could split creating electrons, he found this out while studying rays traveling between charged metal plates in a cathode vacuum tube. He discovered that the rays were consisted of negatively charged particles.
  • Ernest Rutherford

    Ernest Rutherford
    Ernest Rutherford proposes his atomic theory describing the atom as having a central positive nucleus surrounded by negative orbiting electrons. He conducts this theory involving the firing of radioactive particles through minutely thin metal foils (notably gold) and detecting them using screens coated with zinc sulfide (a scintillator).
  • Niels Bohr

    Niels Bohr
    Niels Bohr was the first to discover that electrons travel in seperat orbits around the nucleus. The Bohr model shows that the electrons in atoms are in orbits of differing energy around the nucleus.
  • James Chadwick

    James Chadwick
    Chadwick proved the existence of neutrons. He used scattering data to calculate the mass of this neutral particle and measured the energy or protons emerging from hydrogen atoms