{
  "reviewed": "2026-10-23",
  "scope": "Owner-approved scientific wording and data refinements; no identity, configuration, isotope counts, source snapshot, layout or model geometry changes.",
  "originalSourceCommit": "e11f89362d6fcb700f4137cdba204e00c9ea2e5e",
  "originalSources": "The bundled NIST, IUPAC and PubChem snapshots and original source ZIP remain unchanged. pubchemState retains the original superheavy state label. state is not currently displayed in the UI.",
  "changes": [
    {
      "subject": "Copernicium wording",
      "explanation": "Electrons in very heavy atoms require relativistic quantum calculations to predict their behaviour.",
      "source": "https://doi.org/10.1002/anie.201906966"
    },
    {
      "subject": "Superheavy bulk states Z=104\u2013118",
      "explanation": "Bulk states are unmeasured. Cn/Og predictions are separately labelled theoretical and linked to the respective studies, not presented as established phases.",
      "sources": [
        "https://doi.org/10.1002/anie.201906966",
        "https://doi.org/10.1002/anie.202011976"
      ]
    },
    {
      "subject": "Natural tantalum-180m",
      "explanation": "The natural trace abundance refers to metastable tantalum-180m. Tantalum-180 also has a ground state; both have 73 protons and 107 neutrons.",
      "source": "https://ciaaw.org/tantalum.htm"
    }
  ]
}