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. The scientist who determined the magnitude of the electric charge of the electron was
A. John Dalton.
B. Robert Millikan.
C. J. J. Thomson.
D. Henry Moseley.
E. R. Chang.
3. Rutherford's experiment with alpha particle scattering by gold foil established that
A. protons are not evenly distributed throughout an atom.
B. electrons have a negative charge.
C. electrons have a positive charge.
D. atoms are made of protons, neutrons, and electrons.
E. protons are 1840 times heavier than electrons.