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14 Cards in this Set

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Joseph Thompson
Proved the existence of the electron
James Chadwick
Discovered the neutron
Robert Millikan
Determined the charge on a single electron
Henry Moseley
Showed that periodicity depends on atomic number
Dmitri Mendeleev
Developed the first periodic table of elements
John Dalton
Revived the atomic theory in the early 1800s
Henri Becquerel
Discovered radioactivity
Democritus
Developed the idea of the atomic nature of matter
Joseph Proust
Formulated the law of constant composition
Antoine Lavoisier
Established the law of conservation of matter
Michael Faraday
Experimented with electrolysis
Ernest Rutherford
Developed the idea of the nuclear atom
Marie Curie
Suggested that atoms could disintegrate
Benjamin Franklin
Characterized positive and negative electrical charges