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Democritus' idea was that space and the world are made up of atoms. These atoms are eternal and invisible, so small that their size cannot be diminished, without pores and entirely fill the space they occupy, and homogeneous, differing only in shape, arrangement, position, and magnitude.
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develops model for atom
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Discovered the element thallium in 1861
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developed a more complete understanding of atom with gold foil experiment. proved that atoms are made of mostly empty space
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Einstein published paper offering the first eperimental proof of the existence of atoms
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developes theory about electorn waves. Theory explained why electrons are restricted to their electron cloud
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won Nobel Prize for Physics
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Chadwick observed beryllium releases an unnown radiation which showed the neutron
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wins nobel prize for physics. contributed to electorn cloud model. came up with schroinger equation about the behavior of wave systems
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won nobel prize in physics for developing a model of the neutron proton interaction. made contributions to the nucleus of a atom when involved in nuclear physics during world war 2
