Chemistry: An Introduction to General, Organic, and Biological Chemistry (12th Edition)

Published by Prentice Hall
ISBN 10: 0321908449
ISBN 13: 978-0-32190-844-5

Chapter 4 - Section 4.3 - The Atom - Figure 4.9 - Page 107: 1

Answer

Most of the particles are electrons which have negligible mass as compared to nucleus, hence they passed undeflected, while nucleus is heavy and is deflected

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