Physics: Principles with Applications (7th Edition)

Published by Pearson
ISBN 10: 0-32162-592-7
ISBN 13: 978-0-32162-592-2

Chapter 27 - Early Quantum Theory and Models of the Atom - Misconceptual Questions: 10


Choices A, C, D.

Work Step by Step

Alpha particles are positively-charged, so the nucleus must also be positively charged to repel the alpha particle. If this charge (and mass) were spread out over a large volume, large-angle scattering would not be observed-- but it is observed. Finally, because most of the alpha particles pass through the foil without changing their trajectory, Rutherford’s experiment shows that the atom consists mostly of empty space.
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