Atomic Nucleus
The nucleus is the very dense region consistin o protons an neutrons at the centre o an atom.
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It wis discovered in 1911 as a result o Ernest Rutherford's interpretation o the 1909 Geiger–Marsden gowd foil experiment performed bi Hans Geiger an Ernest Marsden unner Rutherford's direction. The proton–neutron model o nucleus wis proponed bi Dmitry Ivanenko in 1932. Almaist aw o the mass o an atom is locatit in the nucleus, wi a very smaa contreibution frae the electron clood.
References
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