Answer
$_{35}^{87}Br$
Work Step by Step
Es-249 and a neutron combine to form Br-87, Gd-161 and 2 neutrons.
$_{99}^{249}Es + _{0}^{1}n → _{35}^{87}Br + 2 \space _{0}^{1}n + _{64}^{161}Gd$
Chemistry: The Molecular Science (5th Edition)
by Moore, John W.; Stanitski, Conrad L.
Published by
Cengage Learning
ISBN 10:
1285199049
ISBN 13:
978-1-28519-904-7
Chapter 18 - Nuclear Chemistry - Questions for Review and Thought - General Questions - Page 817d: 69c
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