Which metallic ion is present in copper(II) chloride?

• A. Cl^{-}
• B. Cu^{2+}
• C. Cl^{2+}
• D. Cu^{+}

Answer: (B)

Verified step by step guidance

1. Identify the chemical formula given: copper(II) chloride is written as CuCl\_2.
2. Understand the Roman numeral in the name: the (II) in copper(II) indicates the oxidation state of the copper ion, which is +2.
3. Recall that chloride ions (Cl) typically have a charge of -1 each.
4. Since there are two chloride ions, the total negative charge is 2 \times (-1) = -2.
5. To balance the charges in the compound, the copper ion must have a charge of +2, so the metallic ion present is Cu^{2+}.