Question

11 classify the following ions as monatomic or polyatomic. a: cl⁻, b: ca⁺², c: co₃⁻², d: al⁺³, e: oh⁻, f: c₂h₃o₂⁻. for each ion, choose between monatomic and polyatomic.

Explanation:

• A monatomic ion consists of a single atom with a charge. A polyatomic ion consists of two or more atoms bonded together with a net charge.
• For \( \text{Cl}^- \): It is a single chlorine atom with a charge, so monatomic.
• For \( \text{Ca}^{+2} \): Single calcium atom with charge, monatomic.
• For \( \text{CO}_3^{-2} \): Consists of C and O atoms, polyatomic.
• For \( \text{Al}^{+3} \): Single aluminum atom with charge, monatomic.
• For \( \text{OH}^- \): Consists of O and H atoms, polyatomic.
• For \( \text{C}_2\text{H}_3\text{O}_2^- \): Consists of C, H, O atoms, polyatomic.

Answer:

• A. \( \text{Cl}^- \): monatomic
• B. \( \text{Ca}^{+2} \): monatomic
• C. \( \text{CO}_3^{-2} \): polyatomic
• D. \( \text{Al}^{+3} \): monatomic
• E. \( \text{OH}^- \): polyatomic
• F. \( \text{C}_2\text{H}_3\text{O}_2^- \): polyatomic