Science

Who provided evidence for the existence of an atomic nucleas?

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June 23, 2017 8:23PM

In 1911, the scientist Ernest Rutherford directed a beam of alpha particles (each one equivalent to a helium nucleus, with 2 protons and 2 neutrons) at a thin sheet of gold foil - many of the alpha particles (with a charge of +2) were deflected straight back, repelled by the positively charged atomic nuclei within the gold foil. This provided experimental evidence for the existence of the nucleus for the first time.