Answer
11 protons and 12 neutrons
Work Step by Step
Atomic number of the isotope $^{23}_{11}Na$ = 11 = $Z$
Mass number of $^{23}_{11}Na$ = 23 = $Z$
So, number of protons = Atomic number = 11
Number of neutrons = $A - Z = 23-11 $ = 12
Chemistry: A Molecular Approach (3rd Edition)
by Tro, Nivaldo J.
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 - Page 80: 53b
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