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Point out the wrong statement: In an octahedral geometry:

Correct answer: C. an ion with d5 configuration has one unpaired electron both in weak and strong fields.

  • A. a central metal ion with d8 configuration has two unpaired electrons.
  • B. an ion with d6 configuration is diamagnetic in a strong field.
  • C. an ion with d5 configuration has one unpaired electron both in weak and strong fields.
  • D. in d4, d5, d6 and d7 configurations, weak and strong field complexes have different numbers of unpaired electrons.

Explanation

This statement is fundamentally incorrect because the number of unpaired electrons changes:Weak field: All five electrons are unpaired (high-spin configuration).Strong field: Only one electron is unpaired (low-spin configuration).Thus, this contradicts the claim that the number of unpaired electrons is the same in both fields.

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About Transition Elements

Transition elements are identified by their partially filled d subshells in atoms or common ions. The topic covers the electronic structure of d-block elements, including the filling order of 4s and 3d orbitals, variable oxidation states and the distinction between transition elements and elements with completely filled d subshells.

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