Answer
a) 122
b) 134
c) 52
Work Step by Step
(a) For $Hg^{202}_{80}$
$A=202$, $Z=80$ and $N=A-Z=202-80=122$
(b) For $Rn^{220}_{86}$
$A=220$, $Z=86$ and $N=A-Z=220-86=134$
(c) For $Nb^{93}_{41}$
$A=93$, $Z=41$ and $N=A-Z=93-41=52$
Physics Technology Update (4th Edition)
by Walker, James S.
Published by
Pearson
ISBN 10:
0-32190-308-0
ISBN 13:
978-0-32190-308-2
Chapter 32 - Nuclear Physics and Nuclear Radiation - Problems and Conceptual Exercises - Page 1151: 2
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