Answer
covalent network solid
Work Step by Step
The very high melting point leaves covalent network and ionic as the two possible options. Since covalent network solids are very hard and often colorless (such as diamond), this is the best answer.
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 9 - Liquids, Solids, and Materials - Questions for Review and Thought - Topical Questions - Page 421b: 48c
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