Chemistry: A Molecular Approach (3rd Edition)

Published by Prentice Hall
ISBN 10: 0321809246
ISBN 13: 978-0-32180-924-7

Chapter 2 - Sections 2.1-2.9 - Exercises - Problems by Topic: 54c

Answer

43 protons, 56 neutrons

Work Step by Step

Atomic number of the isotope $^{99}_{43}Tc$ = 43 = $Z$ Mass number of $^{99}_{43}Tc$ = 99 = $A$ So, number of protons = Atomic number = 43 Number of neutrons = $A - Z = 99-43 $ = 56
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