Nuclear atom

By firing alpha particles at a very thin gold sheet and capturing whether they were deflected, Rutherford discovered that atoms are mostly empty space with a dense nucleus at the center, confirming the nuclear model of the atom. He showed that alpha particles were helium nuclei.
 Ernest Rutherford England 1911 Nuclear atom

By firing alpha particles at a very thin gold sheet and capturing whether they were deflected, Rutherford discovered that atoms are mostly empty space with a dense nucleus at the center, confirming the nuclear model of the atom. He showed that alpha particles were helium nuclei.