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Democritus is the father of modern science and created the first atomic theory.
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John Dalton created the second atomic theory which states: atoms are invisible and indestructable, atoms can neither be created or destroyed, and that all atoms of a given element are identical
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created third atomic theory which says that the charges in both posistive and negative are equal in magnetude
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Ernest Rutherford created the fourth atomic theory and the first acurate one. He discovered that the atom must have almost all of its mass in the center.
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discovered that electrons orbit the nucleus without losing energy
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James Chadwick worked with Ernest Rutherford in his laboratory and he discovered the neutron.
