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-Discovered the atom
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-All matter is composed of atoms
-Atoms are indivisible and indestructible -
-Discovered the electron using a cathode ray tube
-Proposed that atoms have negatively charged electrons embedded in a positively charged substance -
-Performed the gold foil experiment
-Discovered the nucleus
-Discovered that the nucleus contains the protons and neutrons of an atom -
-Made the Bohr model
-Also called the planetary model because it depicts electrons orbiting around the nucleus of the atom -
-Electron cloud model is the modern model of an atom
-says we cannot know exactly where an electron is at any given time
