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the claim
The electronic configuration of Fe(II) ion is [Ar] 3d6
the verdict
COMMON KNOWLEDGE
no citation needed for this one
refutedsupported
the weight of evidence
no sources on either side

The electronic configuration of a neutral iron atom is [Ar] 3d6 4s2, so losing two electrons to form the Fe(II) ion leaves the valence configuration as [Ar] 3d6. This is a matter of basic definition in inorganic chemistry and does not require citation.

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The analysis

The claim states the fundamental electron configuration of the Fe(II) ion. This is a basic chemical fact taught universally in general and inorganic chemistry, making it common knowledge by definition and everyday scientific observation.

Everything we examined (12)
  1. The Influence of Light Rare-Earth Substitution on Electronic and Magnetic Properties of CoFe2O4 Nanoparticlespeer-reviewedno side takennot shown: read and judged not to bear on this claim
  2. Janus monolayer TaNF: A new ferrovalley material with large valley splitting and tunable magnetic propertiespeer-reviewedno side takennot shown: read and judged not to bear on this claim
  3. A manganese(I) complex with a 190 ns metal-to-ligand charge transfer lifetime.peer-reviewedno side takennot shown: read and judged not to bear on this claim
  4. Understanding Single-Molecule Magnet properties of lanthanide complexes from 4f orbital splitting.peer-reviewedno side takennot shown: read and judged not to bear on this claim
  5. Exploring spin states and ligand field splitting in metal complexes: a theoretical analysis of spin-orbital interactions and magnetic properties.peer-reviewedno side takennot shown: read and judged not to bear on this claim
  6. Spin effect regulation as a design principle for M-N-C catalysts for oxygen electrocatalysis.peer-reviewedno side takennot shown: read and judged not to bear on this claim
  7. Geometry-defect-spin coupling in chiral high-entropy systems: Multiscale mechanisms of GHz electromagnetic dissipation.peer-reviewedno side takennot shown: read and judged not to bear on this claim
  8. Proximity Engineering of Fe‒N<sub>4</sub> Twins for Oriented Generation of Singlet Oxygen for Hospital Wastewater Treatment.peer-reviewedno side takennot shown: read and judged not to bear on this claim
  9. Role of Water in Modulating the Fe<sup>3+</sup>/Fe<sup>2+</sup> Redox Couple in Iron-Based Complexes and Single-Atom Catalysts.peer-reviewedno side takennot shown: read and judged not to bear on this claim
  10. Resolving consecutive excited-state evolution in Fe-amido chromophores by wide-band optical transient absorption spectroscopy.peer-reviewedno side takennot shown: read and judged not to bear on this claim
  11. Redox and Spin States Series of an Organometallic Heme Analogue Based on a Non-Innocent NHC/N-Donor Hybrid Macrocycle.peer-reviewedno side takennot shown: read and judged not to bear on this claim
  12. Spin State Modulation Strategies for Transition Metal-Based MRI Contrast Agents.peer-reviewedno side takennot shown: read and judged not to bear on this claim
The paper trail · every fact has a biography
first checked05 Aug 2026
judged → COMMON KNOWLEDGE · 9505 Aug 2026
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