In simple terms, that assertion is correct, but for those with an expertise in the field, the longer answer to who did it ...

This video also looks at the basic parts of an atom (protons, neutrons and electrons) and why the traditional model of the atom is not correct. Electrons are unpredictable - we cannot know the ...

BBC Bitesize A simple model of an atom shows a nucleus ... proving that the atom had smaller constituent parts. That opened the door to subatomic hypotheses and experimentation.