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ChemistryNEET 2021Electronic configuration, Aufbau, Pauli, Hund

Structure of Atom

From the following pairs of ions, which one is not an isoelectronic pair?

  1. A.O2−,F−\mathrm{O^{2-}, F^-}
  2. B.Na+,Mg2+\mathrm{Na^+, Mg^{2+}}
  3. C.Mn2+,Fe3+\mathrm{Mn^{2+}, Fe^{3+}}
  4. D.Fe2+,Mn2+\mathrm{Fe^{2+}, Mn^{2+}}✓

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From Chemistry › Structure of Atom › Electronic configuration, Aufbau, Pauli, Hund — lectures, notes and every past question on it.

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