WBCS.LIVE practice question

Among Na⁺, Fe²⁺, Co³⁺ and Zn²⁺ which is/are not transition metal ions?

Solve this multiple-choice question and check the correct answer with its explanation below.

Answer options

  1. Na⁺ and Co³⁺
  2. Fe²⁺ and Co³⁺
  3. Fe²⁺ and Zn²⁺
  4. Na⁺ and Zn²⁺

Correct answer and explanation

Correct answer: Na⁺ and Zn²⁺

Explanation: ✅ Correct Answer: D) Na⁺ and Zn²⁺ 📚 Explanation: Transition metals are defined by their partially filled "d" orbitals. Sodium (Na+) is an alkali metal ion with no "d" electrons, and Zinc (Zn2+) has a completely filled "d" orbital, so they are not considered transition metal ions. Iron (Fe2+) and Cobalt (Co3+) both have partially filled "d" subshells, which allows them to show typical transition metal properties. This distinction is a fundamental part of the periodic table study.