Transition metals, configurations and oxidation states

Transition metals, configurations and oxidation states Quiz

Spec 17.1–3 · Edexcel International A Level Chemistry: Quiz

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  1. 1. Which atom is the exception to the usual filling order, having the configuration [Ar] 3d⁵ 4s¹?

    • A. Manganese
    • B. Iron
    • C. Chromium
    • D. Vanadium

  2. 2. What is the electronic configuration of Ni²⁺?

    • A. [Ar] 3d⁸
    • B. [Ar] 3d⁶ 4s²
    • C. [Ar] 3d⁷ 4s¹
    • D. [Ar] 3d¹⁰

  3. 3. Which ion has an empty 3d sub-shell?

    • A. Ti³⁺
    • B. Zn²⁺
    • C. Cu⁺
    • D. Sc³⁺

  4. 4. What is the oxidation number of chromium in Cr₂O₇²⁻?

    • A. +3
    • B. +6
    • C. +7
    • D. +12

  5. 5. Which statement best explains variable oxidation numbers in transition metals?

    • A. The 4s and 3d energies are very different
    • B. Only 4s electrons can be removed
    • C. The 4s and 3d sub-shells are close in energy, so electrons from both can be lost
    • D. Transition metals have no ionisation energies

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