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Who discovered the electron?
J.J. Thomson in 1897 through cathode ray tube experiments
Who discovered the proton?
Ernest Rutherford through his alpha particle scattering experiment
Who discovered the neutron?
James Chadwick in 1932
What is an atom made of?
Protons and neutrons in the nucleus, with electrons orbiting around it
What is the charge on a proton?
+1 (positive charge)
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