trustme.bro/r/…
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the claim
Uncombined single elements in their standard state have an oxidation state of zero.
the verdict
COMMON KNOWLEDGE
no citation needed for this one
refutedsupported
the weight of evidence
no sources on either side

The statement that uncombined single elements in their standard state have an oxidation state of zero is a fundamental, foundational rule of chemistry taught in introductory chemistry courses, and therefore requires no citation.

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The analysis

The claim is a definitional rule of chemistry (the standard assignment rule for oxidation states of free elements). According to the prompt instructions, a claim that is trivially true by definition or direct everyday observation is common knowledge, requiring no citation and yielding the COMMON_KNOWLEDGE verdict with empty index arrays.

Everything we examined (12)
  1. A physics-based approach to modeling real-fuel combustion chemistry - I. Evidence from experiments, and thermodynamic, chemical kinetic and statistical considerationspeer-reviewedno side takennot shown: read and judged not to bear on this claim
  2. Biogenic metallic elements in the human brain?peer-reviewedno side takennot shown: read and judged not to bear on this claim
  3. Prediction of the Cu oxidation state from EELS and XAS spectra using supervised machine learningpeer-reviewedno side takennot shown: read and judged not to bear on this claim
  4. Composition Based Oxidation State Prediction of Materials Using Deep Learning Language Modelspeer-reviewedno side takennot shown: read and judged not to bear on this claim
  5. Faraday law, oxidation numbers, and ionic conductivity: The role of topology.peer-reviewedno side takennot shown: read and judged not to bear on this claim
  6. Formation of Fully Stoichiometric, Oxidation-State Pure Neptunium and Plutonium Dioxides from Molecular Precursorspeer-reviewedno side takennot shown: read and judged not to bear on this claim
  7. Support Surface Chemistry Evolution During the Preparation of Metal Oxide–Activated Carbon Catalysts by Wet Impregnation: A FT-IR Spectroscopy Analysispeer-reviewedno side takennot shown: read and judged not to bear on this claim
  8. Crystal Chemistry: New rules for the 21st Centurypeer-reviewedno side takennot shown: read and judged not to bear on this claim
  9. Revealing the Mechanism of TEMPO-Hypervalent Iodine(III) Oxidation of Alcoholspeer-reviewedno side takennot shown: read and judged not to bear on this claim
  10. Balancing redox equations through zero oxidation number methodpeer-reviewedno side takennot shown: read and judged not to bear on this claim
  11. Chemical Kinetic and Mechanistic Investigation of Cobalt and Manganese Recovery from Aqueous Solutions by Ozone Oxidative Precipitation.peer-reviewedno side takennot shown: read and judged not to bear on this claim
  12. The production and electrochemical performance analysis of an O3-NaTi<sub>0.2</sub>Mn<sub>0.2</sub>Fe<sub>0.2</sub>Ni<sub>0.2</sub>Co<sub>0.2</sub>O<sub>2peer-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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