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Studied Gas discharge tubes
Plum pudding model of an atom and discovered negative particles
Discovered polonium and radium
Gold foil experiment/ Rutherford model of an atom
discovered x rays
Planetary model of an atom
Cloud model of an atom
said electron path is undetermined
Plumb pudding model
An atom is a solid body having an equal number of positive and negative charges
Dense nucleus with a lot of empty space
Electrons have definite energy levels, and revolve around a nucleus
Electrons are found in loosely defined energy levels