The Chemical Formula of Sand is___________?
Correct answer: B. SiO2
- A. Si2O3
- B. SiO2
- C. Al2O3
- D. Sr2O
Explanation
The main chemical constituent of ordinary sand is silicon dioxide, with the formula SiO2. Si2O3 is an incorrect formula and Al2O3 represents aluminium oxide, so the likely mistake is confusing sand with another oxide mineral.
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About Crystalline Solids
Crystalline solids contain particles arranged in a regular repeating lattice described by a unit cell. Their study includes coordination number, packing efficiency, density, anisotropy, cleavage, polymorphism and common crystal systems, along with ionic, molecular, covalent network and metallic crystals. Crystalline order differs from the random arrangement of amorphous solids.
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