12. Which one of the following substances does not exist in the indicated solid type? A.graphite–covalent...
12. Which one of the following substances does not exist in the indicated solid type? A.graphite–covalent crystals B.Na–metallic crystals C.SiO2–molecular crystals D.NaCl–ionic crystals E.diamond–covalent crystal (Please explain how to do this sort of problem)
Homework Answers
Answer is C. SiO2
Explanation : SiO2 is network crystalline solid not molecular crystals solid. Network crystalline solids are incredibly hard, have high melting points and are poor conductors of heat and electricity while molecular crystal solids are soft and have relatively low melting temperature.
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12. Which one of the following substances does not exist in the indicated solid type? A.graphite–covalent...
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