Evaluating oxide formulas and structures

Steps:

• Verify A: Silicon(IV) oxide formula is SiO₂, matching the +4 oxidation state and 1:2 ratio, so empirical formula is SiO₂. Correct.
• Verify B: Phosphorus(V) oxide exists as P₄O₁₀ molecules, confirming the molecular formula. Correct.
• Verify C: SiO₂ forms a giant covalent lattice, not discrete molecules; P₄O₁₀ is simple molecular. Both not simple molecular. Incorrect.
• Conclude: A and B are correct statements.

Why D is correct:

• D identifies A and B as the true statements, aligning with empirical/molecular formula definitions and bonding classifications.

Why the others are wrong:

• A: Only lists one correct statement, omitting B.
• B: Only lists one correct statement, omitting A.
• C: Includes a false claim about both being simple molecular compounds.

Final answer: D