How Are Network Solids,such as Diamond,C,and Quartz,SiO₂,distinguished from Molecular Crystals

question 7

Multiple Choice

How are network solids,such as diamond,C,and quartz,SiO₂,distinguished from molecular crystals such as I₂?

• A)Network solids have very high melting points
• B)Network solids are ionic, while molecular ones are covalent substances
• C)Network solids dissolve in water; molecular ones do not
• D)Network solids are excellent conductors of electricity, while molecular crystals are nonconductors
• E)Network solids have individual molecules of fixed size; molecular crystals do not

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