Which one of the following have no cleavage plane? A) Graphite B) NaCl crystals C) Copper crystals D) Ice
Answer: Copper crystals
Explanation
Cleavage is the tendency of a crystal to break along specific planes of weakness.
Copper, being a metal, has a unique atomic structure that doesn't exhibit distinct planes of weakness.
When stressed, it tends to deform rather than cleave, resulting in a jagged fracture.
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