Chemistry, 07.10.2019 17:00 MathChic68

Which of the following best explains why diamonds are very hard?
a. diamonds are made up of several different isotopes of carbon.
b. diamonds are made up of several different allotropes of carbon.
c. the atoms in a diamond are arranged in a rigid crystalline structure.
d. the atoms in a diamond are arranged in flat sheets that are tightly bonded.

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Which of the following best explains why diamonds are very hard?
a. diamonds are made up of...