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Period: to
timespan
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John Dalton date of birth, Eaglesfield Cumberland, Concluded that all madder was composed of atoms. model of the atom being a solid sphere with atoms.
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Death of John Dalton, Manchester England
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Death of Robert A. Millikan
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Birth of JJ Thomson, United Kingdom at Cheetham Hill. he discovered the electron and that the number of electrons should equal the atomic number of the element. He used a Cathode Ray tube for his experiment
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Birth of Robert A. Millikan,
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birth of ernest ruthersford,
he hypothesized about the nucleus, used the gold foil experiment. discovered protons -
birth of Niels bohr,
proposed that energy levels of electrons are discrete. first to make model of the atoms with electrons orbiting nucleus -
Robert A. Millikan received PHD
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Thompson received the Nobel Prize in Physics
Thompson received the Nobel Prize in Physics -
nobel prize for measuring electrons
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death of Ernest Ruthers ford
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start of WWII
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Death of JJ Thomson
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Robert retired
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Death of Niels Bohr