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Democritus

Published on Nov 18, 2015

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PRESENTATION OUTLINE

Democritus

democritus' atomic model

  • Democritus thought that the atom was just one little sphere
  • he thought that in between atoms, there was empty space
  • he thought that the atoms size, and shape was determined, by
  • the materials characteristics. He thought water atoms were  
  • smooth and slippery, and salt atoms were sharp and pointed because  of thei

Democritus' contributions

  • He was a philosipher, not scienctist
  • he said atoms are impossible to divide, and impossible to destroy
  • He also said everything is made up of atoms

John Dalton

Photo by stevendepolo

John dalton atomic model

  • John Dalton had the idea of a "Billiard ball" atom
  •  he said atoms can't be destroyed, divided, or created 
Photo by Pete Doniec

John daltons' contributions

  • was an English chemist, physicist and meteorologist 
  • known for his work in the "modern atomic theory"
  • was a scientist, not a philosopher 

NieLS BOHR

  • was a danish physicist and 
  • won the nobel prize in 1922
  • dissolved nobel piece prize to avoid being
  • caught by germans during hitlers reign

niels bohr contributions

  • the "molecular double-slit experiment
  • light is passed through a barrier with two slits.
  • dark stripes and light is produced from the experiment.
Photo by Mrs. Pugliano

Niels bohr atomic model

  • Niels Bohr came up with the "Planetary Model" for an atom

J.J. thomson

j.j. thomson contributions

  • his experiment was the "Cathode Tube"
  • took a tube with gas in it, and sent an electrical
  • charge through it and the gas lit up and bent 
  • towards the electric source.

J.J. thomson atomic model

  • he discovered the electron

erwin schrODINGER

  • He was an Austrian Physicist 
  • won the nobel prize
  • he had tuberculosis 

erwin schrodinger contributions

  • studied quantum mechanics
  • created wave mechanics
Photo by MKSeery

erwin schrodinger atomic model

james chadwICK

james chadwick contributions

  • discovered the neutron

james chadwick atomic model

ernest rutherford

ernest rutherford contributions

  • worked with J.J. Thomson
  • shot light at golden foil and, if light hit a 
  • atom, it deflected in a random direction.
  • if it didn't, the light just went straight ahead

ernest rutherford atomic model

  • discovered the proton