jul 11, 1932 - Chadwick Discovers The Neutron

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Using alpha particles, Chadwick discovered a neutral atomic particle with a mass close to a proton. So the neutron was discovered. Chadwick's experiment included projecting alpha
particles toward Beryllium "the light element". The emitted particles after enduring the Beryllium target (becomes neutrons) and fall on the paraffin wax.The paraffin wax in turn releases another type of particle (protons). At that time atoms were thought to be made up of protons and electrons.

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