Studied at McGill University in Montreal
Discovered radioactivity involved emission of 2 kinds of particles, alpha and beta.
Discovered that an atom contained a small highly dense positively charged center, known as the nucleus.
The oil drop experiment was performed by Robert A. Millikan and Harvey Fletcher in 1909 to measure the elementary electric charge (the charge of the electron). The experiment entailed observing tiny charged droplets of oil between two horizontal metal electrodes.
The Rutherford-Geiger Experiment is also known as the Gold Foil Experiment. They were a landmark series of experiments by which scientists discovered that every atom contains a nucleus where its positive charge and most of its mass are concentrated.