Question

which of the given substances can be classified as a compound?
□ methane (ch₄)
□ gold (au)
□ diamond (cₙ)
□ table salt (nacl)
□ chlorine gas (cl₂)
□ sucrose (c₁₂h₂₂o₁₁)

Explanation:

A compound is a substance made of two or more different elements chemically bonded.

• Methane ($\ce{CH4}$): Has C and H, bonded chemically → compound.
• Gold (Au): Single element → not compound.
• Diamond ($\ce{C_n}$): Single element (C) → not compound.
• Table salt (NaCl): Has Na and Cl, bonded → compound.
• Chlorine gas ($\ce{Cl2}$): Single element (Cl) → not compound.
• Sucrose ($\ce{C12H22O11}$): Has C, H, O → compound.

Answer:

• methane ($\ce{CH4}$)
• table salt (NaCl)
• sucrose ($\ce{C_{12}H_{22}O_{11}}$)