Editorial Policy

Student-first writing

Content on Periodixy is written for students meeting a topic for the first time: plain global English, SI units by default, worked examples over abstract definitions, and honest flags where a simplification is being made (“at 25 °C…”, “for main-group elements…”). We aim to be accurate and understandable — in that order.

Original content

All explanations, summaries, fun facts and guides are written originally for Periodixy. We do not copy text from encyclopedias, textbooks or other chemistry websites. Underlying scientific facts are, of course, the shared property of science.

Data handling

• Element values live in structured data files, so a correction fixes every page at once.
• Unknown, disputed or highly variable values are shown as “Not available” or “Varies” — never guessed.
• Approximate values (e.g. covalent radii, discovery years for ancient elements) are labelled as approximate.
• Scientific values can legitimately differ between sources; we aim for values suitable for education.

Corrections

Corrections are welcomed and taken seriously. Every element page carries a “Report a correction” link, and reports are checked against reliable references before the data files are updated. See Data Sources & Corrections.

Advertising separation

If advertising appears on Periodixy, it is clearly labelled, never disguised as content or controls, never placed to trick clicks, and has zero influence on what we write. Educational usefulness comes first on every page; ads exist only to keep the site free.

Updates

Chemistry content is reviewed and extended over time — new tools, more worked examples, refreshed data. Pages are not artificially “bumped”; when we say something was updated, it was.