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Came up with the idea of two things in the universe: atoms and voids. Atoms were solid and infinite in number and shape and differing in size. All atoms were floating around the infinite void.
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1904 suggested model was a sphere of positive matter where electrons were positioned by electrostatic forces. Worked to estimate the number of electrons in an atom.
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Discovered that atoms have a small charged nucleus surrounded by lots of empty space, circled by tiny electrons. Credited with the discovery of the proton in 1919 and hypothesized the existence of the neutron.
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.