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Democritus said that matter is made up of atoms.
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Dalton proposed an atomic theory: that elements consisted of tiny particles called atoms. Also it is made up of spherical masses and motions.
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Thomson discoverd the electron.
He descibed the atom as a ball of positive charge containing a number of electrons.
Thomson's model is known as chocalate chip model in U.S. -
He used his "gold foil" experiment to determine that the nucleus of the atom is very dense and had a positive charge.
Rutherford discovered the proton.
Also, he assumed that the electrons were oustide the nucleus of the atom. -
Bohr explained the atomic structure of the atom is "successive" orbital shells of electrons
This is known as Bohr Plantary model. -
Schrodinger and de Broglie identified the electron cloud model as the probable location of moving electrons.
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Chadwick discovered a particle within the nucleus that has a mass similar to that of a proton.
He is credited for discovering the neutron. -
Made the decision to drob the atomic bomb on Hiroshima and Nagasaki.
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Voltage multiplier is associated with the building of the atomic bomb.
Cockroft and Walton influenced this idea. -
-A nuclear reactor blew up in Chernobyl.
-30 people died and 130,000 had to be evacuated do to the radiation levels.
