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Thought everything was made of something
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Thought of the atom
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things were made of earth, fire, air, water
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Some as Democritus
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radio activity
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Discovered Electrons
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Shot atoms at gold foil and some bounce back
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Gold Foil Experiment
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he made Bohr model
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Determining the charge and mass of a electron
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Discovered Isotopes
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The Quantum Model
Plan projects on a visual timeline
Map milestones, phases, deadlines, and key events in one place so the sequence is easier to see and share. Timetoast is a timeline maker for work, school, research, and stories.