Rutherford Gold Foil Experiment - Backstage Science Apr 2026

At the time, scientists believed in the , where an atom was a blob of positive charge with electrons scattered inside like fruit in a pudding. If this were true, the heavy alpha particles should have whizzed straight through the "soft" atoms.

A detector that would flash when hit by an alpha particle. The Unexpected Result Rutherford Gold Foil Experiment - Backstage Science

Positively charged particles emitted from a radioactive source (radium). At the time, scientists believed in the ,

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In 1911, Ernest Rutherford and his team (Hans Geiger and Ernest Marsden) conducted the "Gold Foil" experiment, which Backstage Science describes as essentially the .

While most did pass through, Rutherford was shocked to find that: