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Greece - stated that all matter is made up of atoms. He also stated that atoms are eternal and invisible and so small that they can’t be divided, and they entirely fill up the space they’re in.
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Greece - provided the method of gathering scientific facts, which proved as the basis for all scientific work.
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England - formed the atomic theory, which states that all matter is composed of tiny, indestructible particles called atoms that are all alike and have the same atomic weight.
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England - created the Crookes’ tube and demonstrated that cathode rays travel in straight lines and produce phosphorescence and heat when they strike certain materials.
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England - discovered the electron and developed the plum-pudding model of the atom
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USA - found out the electric charge of the electron
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England - used the results of his gold-foil experiment to state that all the mass of an atom were in a small positively-charged ball at the center of the atom.
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Denmark - stated that the electrons moved around the nucleus in successively large orbits. He also presented the Bohr atomic model which stated that atoms absorb or emit radiation only when the electrons abruptly jump between allowed, or stationary, states.
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England - discovered the neutrally-charged neutron.
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For this theory and the applications of it which resulted especially in the discovery of allotropic forms of hydrogen, Heisenberg was awarded the Nobel Prize for Physics for 1932.
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Germany - discovered nuclear fission, in which the nucleus of an atom breaks up into two separate nuclei, while experimenting with uranium.
