Data Sources & Corrections
How our element data is structured
Every number on Periodixy — atomic masses, melting points, electronegativities, configurations — lives in a single structured dataset, separate from the written content. Pages, calculators, the periodic table and the comparison tool all read from that one source, so a verified correction propagates everywhere at once.
Where the values come from
- Core numeric data (atomic masses, phase points, densities, electron configurations, ionization energies, electron affinities, electronegativities) is derived from openly licensed compilations of standard reference values, of the kind published by IUPAC and standard chemistry handbooks.
- Curated additions (common oxidation states, approximate covalent radii, discovery years) reflect widely used educational reference values and are marked as approximate where appropriate.
- All prose — summaries, uses, history, fun facts, safety notes — is written originally for Periodixy and fact-checked against the numeric data.
Specific citation entries for individual values will be added to this page as the dataset is audited.
Accuracy limits — please read
- Values are suitable for education. For professional or laboratory-critical use, verify against an authoritative, current reference.
- Different reputable sources legitimately disagree in the final decimal places; atomic masses are periodically revised.
- For synthetic and very rare elements, many properties are predictions or single measurements — we mark unknowns as “Not available” instead of guessing.
- Covalent radii and similar derived quantities vary by definition and method; ours are labelled approximate.
Report an error
Spotted something wrong? Use the correction form (or the “Report a correction” link on any element page). Including the page URL and a reference source gets fixes applied fastest. Thank you — reader corrections genuinely improve the site for every student after you.