Ciencia fechas

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5 Terms

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1897

Using cathode-ray tubes, J.J. Thomson identifies the electron and determines the ratio of the mass of an electron to its electric charge.

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1911

With the gold foil experiment, Ernest Rutherford determines properties of the nucleus, including charge, relative size, and density.

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1913

Niels Bohr publishes a theory of atomic structure relating the electron arrangement in atoms to atomic chemical properties.

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1932

James Chadwick proves the existence of neutrons.

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1938

Lise Meitner, Otto Hahn, and Fritz Straussman split uranium atoms in a process they called fission.