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Which of the following is not crystal?

Physics
WAEC 1990

Which of the following is not crystal?

  • A. Sodium chloride
  • B. Lead
  • C. Copper (II) tetraoxosulphate (VI)
  • D. Glass
  • E. Germanium
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Correct Answer: Option D
Explanation

Glass is not a crystal because it lacks the long-range ordered atomic structure characteristics of crystalline materials. instead, it is an amorphous solid.

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