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400
Domocritus
Domocritus suggested that all matter was formed of different types of tiny discrete particles and that the properties of these particles also determined the properties of matter. -
Period: 400 to
history of the atomic model
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Sep 1, 600
Aristotle
Provided the method of gathering scientific facts. -
John Dalton
He proposed atoic theory with circular solid mass in motion. -
J. J Thomson
He discribed atoms as a ball of positive charges containing a number of electrons. -
Hantaro Nagoako
He created a planetary odel of the atom but was incorrect. His model did discover the atoms rings. -
Ernest Marsden
He discovered the nucleus. -
Aston
Discovered the existence of isotopes through the use of a mass spectrograph. -
Nelis Bohr
He Said that the atom is succesive or bital shells of electrons. He also came up with the Bohr Planetary Model. -
Erwin Schrodinger
He proposed the Electron Cloud Theory. He identified the electron cloud as the probable location of moving particles. -
Ernest Rutherford
He determined that the nucleas of an atom is very dense and has a ositive charge. -
Louis de Broglie
He determand that the atoms move in a wave like motion. -
James Chadwick
He proved the existence of neutron. He discovered a particle within the nucleus that has a mass simular to a protron. -
Enrico Fermi
He conducted the fist chain reaction releasing energy from the atoms nucleus.
