Answer
Please see the work below.
Work Step by Step
We know that below $13C^{\circ}$ , the stable metallic allotrope of tin undergoes a transition to the brittle powder allotrope called gray tin.
General Chemistry 10th Edition
by Ebbing, Darrell; Gammon, Steven D.
Published by
Cengage Learning
ISBN 10:
1-28505-137-8
ISBN 13:
978-1-28505-137-6
Chapter 21 - Chemistry of the Main-Group Elements - Questions and Problems - Page 929: 21.76
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