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Minerals (silicates): Quartz crystals used in clocks and electronics are chemically what compound? Identify the correct oxide making up quartz (rock crystal). Choose the correct compound.

Difficulty: Easy

Silicon dioxide (SiO2)
Germanium oxide (GeO2)
A mixture of GeO2 and SiO2
Sodium silicate (Na2SiO3)

Correct Answer: Silicon dioxide (SiO2)

Explanation:

Given data

Material: Quartz crystals in oscillators/timekeeping.

Concept/Approach
Natural and synthetic quartz are crystalline silicon dioxide (SiO₂), prized for piezoelectric properties used in stable frequency control.

Final Answer
Silicon dioxide (SiO2)

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