scientists

showed first experimental evidence to support his model of the atom (1st atomic theory) tiny invisible particles; solid mass

developed a model of the atom in which a pos mass was embedded with neg electrons- "plum pudding model"

knew from the start that his model of the atom could not exist- nuclear model- protons and neutrons in nuceleus surrounded by neg electrons

developed a model of the arom that was like our solar system- circular orbits around the nucelus

his model treats the electron as behaving like a wave, not a particle, as it moves around the nucleus

developed a theory in which you could not tell both the speed and position of the electron at the same time

described how particles can also have a wave nature

showed that energy changed in discrete units called quanta

described the wave nature od light and has w unit named after him

described the particle nature of light (photoelectric effect) and did not believe om quantum mechanics