Chemistry (4th Edition)

Published by McGraw-Hill Publishing Company
ISBN 10: 0078021529
ISBN 13: 978-0-07802-152-7

Chapter 2 - Questions and Problems - Page 76: 2.21

Answer

145 neutrons.

Work Step by Step

Atomic number (Z) of Pu (Plutonium) = 94 Given, Mass number (A)= 239 We know, Number of neutrons, n = A-Z= 239-94 = 145.
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