Consider the following electron configurations to answer the question.(i)   1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s¹
(ii)   1s²2s²2p⁶3s²3p⁵
(iii)   1s²2s²2p⁶3s²3p⁶4s²3d⁸
(iv)   1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶
(v)   1s²2s²2p⁴3s¹
An example of a configuration of a transition metal is ________.

• A. (i)
• B. (ii)
• C. (iii)
• D. (iv)
• E. (v)

Answer: (C)

Verified step by step guidance

1. Understand the definition of a transition metal: Transition metals are elements found in the d-block of the periodic table, which typically have partially filled d orbitals.
2. Examine each electron configuration to identify which one corresponds to a transition metal. Look for configurations with partially filled d orbitals.
3. Configuration (i): 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6 5s^1. This has a filled 3d orbital, not a partially filled one.
4. Configuration (ii): 1s^2 2s^2 2p^6 3s^2 3p^5. This does not involve d orbitals, so it cannot be a transition metal.
5. Configuration (iii): 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^8. This has a partially filled 3d orbital, indicating it is a transition metal.