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Search the table by property, category, state or year, e.g. mp>1000, noble gas. Search guide

About this periodic table

periodixtable.com is a fast, free periodic table built for students, teachers and anyone curious about the elements. Every element has its own page, with properties, atomic structure, discovery history, name origin, uses and notable facts.

What you can do here

Who it is for

Students revising for exams, teachers preparing lessons, writers, and anyone who wants a quick, reliable answer about an element, with no sign-up required. The site is free to use.

Data sources

  • PubChem periodic table (U.S. National Library of Medicine, public domain): atomic masses, melting and boiling points, densities, electronegativity, atomic radii, ionisation energies, electron affinities, oxidation states and CPK colours.
  • Periodic-Table-JSON by Bowserinator: table layout, electron shells and configurations, successive ionisation energies, molar heat capacities and appearance.
  • IAEA Live Chart of Nuclides (International Atomic Energy Agency, Nuclear Data Section): every isotope’s natural abundance, half-life, decay mode and atomic mass.
  • Wikipedia’s element data pages (CC BY-SA 4.0), which compile the CRC Handbook of Chemistry and Physics, Kaye & Laby, Lange’s Handbook and WebElements: hardness, elastic moduli, thermal and electrical conductivity, heats of fusion and vaporisation, liquid density and abundances in Earth’s crust, sea water, the Sun and the Solar System. The Compounds tab’s names and formulas come from Wikipedia’s Glossary of chemical formulae.
  • Discovery records, name origins, summaries, facts and uses are written for this site from standard references, including IUPAC and the Royal Society of Chemistry.

How to read the values

Temperatures are given in kelvin, Celsius and Fahrenheit. Densities of gases are shown in grams per litre at standard conditions. For elements without a standard atomic weight, the mass in [brackets] is the mass number of the longest-lived isotope. Properties of superheavy elements (atomic number 104 and up) are mostly theoretical predictions.

Licences and attribution

periodixtable.com combines data and components from other sources. Each one keeps its own licence, listed here. Last updated: 5 November 2026.

Ownership

periodixtable.com is a compilation. We do not claim ownership of the element data, facts or the open-source tools it is built on, which come from the sources listed below and keep their own licences. The pages are assembled and summarised in our own words from those public sources. The site’s code, layout and design were written and adapted by the site owner for this project, apart from the open-source components listed below, which keep their own licences. The printable PDFs may be printed, copied and shared unchanged, with their footer and QR code, for personal, classroom and other non-commercial educational use. For any other use, contact us.

Data and its licences

  • PubChem (U.S. National Library of Medicine): masses, melting and boiling points, densities, electronegativity, radii, ionisation energies, electron affinities, oxidation states and colours. NCBI data is in the public domain under the NCBI policies, though individual contributors to PubChem may hold rights in their own data.
  • Periodic-Table-JSON by Bowserinator: electron shells and configurations, successive ionisation energies, molar heat capacities and appearance. Licensed under CC BY-SA 3.0. We converted and combined the values with other sources, and the adapted data is shared under CC BY-SA 4.0, a licence CC lists as compatible.
  • IAEA Live Chart of Nuclides (Nuclear Data Section): isotope abundances, half-lives and decay modes, used with credit under the IAEA’s terms of use.
  • Wikipedia element data pages and its Glossary of chemical formulae: hardness, elastic moduli, thermal and electrical conductivity, heats of fusion and vaporisation, liquid density, abundances, and the compound names and formulas. This material is licensed under Creative Commons Attribution-ShareAlike 4.0 (CC BY-SA 4.0). We converted units, rounded values and combined them with other sources. The adapted data stays under CC BY-SA 4.0: if you reuse it, credit Wikipedia and its contributors, indicate changes, and share your version under the same licence.

Open-source components

Trademarks

Other names and marks mentioned on this site belong to their owners. periodixtable.com is not affiliated with or endorsed by them. If you believe anything here infringes your rights, please tell us and we will look into it promptly.

Corrections

Spotted an error? Values for some elements vary between sources, and discovery credit is sometimes disputed. We welcome corrections with a reference. Send them through the contact page.

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