Free Periodic Table
Periodic Table shows all 118 elements with properties from PubChem, such as atomic mass, electron configuration, oxidation states, melting point and density. Color it by category, block, state or a property heatmap to see trends, quiz yourself on symbols, names, positions or atomic numbers, and download an A4 or A3 PDF poster.
- Data:
- PubChem (NCBI), 118 elements
- Quiz:
- 15 questions or 60 seconds
- Poster:
- PDF, A4 or A3 landscape
- Price:
- Free
- Runs:
- Locally, in your browser
- Uploads:
- None: files never leave your device
- Account:
- Not needed
Quick answers
Where does the data come from?
From PubChem, the free chemistry database of the US National Center for Biotechnology Information. Its periodic table data is in the public domain.
Why are some values missing?
Not every property has been measured for every element, especially the heaviest, short-lived ones. Missing values are shown as a dash and in grey on heatmaps.
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How to use the Periodic Table
- Click any element (or move with the arrow keys and press Enter) to see its properties: mass, electron configuration, oxidation states, melting and boiling points, density and more.
- Colour the table by category, block, state at room temperature, or a property such as electronegativity or atomic radius to see the trends.
- Type in the search box or click a legend entry to highlight matching elements.
- Test yourself with the quiz: symbols, names, positions or atomic numbers, against the clock or over 15 questions.
- Download a colour poster as a PDF in A4 or A3 to print.
Credits & open source
Our own code plus open-source libraries. Thank you to the people who make these projects.
- pubchem-elementsPeriodic table data from PubChem (US government work, public domain). © Kai Page (package); data from PubChem, NCBI · Unlicense
- jsPDFPDF generation in the browser. © James Hall, yWorks GmbH and contributors · MIT
- fflateFast ZIP compression for batch downloads. © Arjun Barrett · MIT
Web platform APIs used: Keyboard Events, Web Crypto, localStorage, File API.
- PubChem Periodic Table by National Center for Biotechnology Information (NCBI) (Public domain (US government work)) — element properties
Full license texts: third-party notices · all credits
Frequently asked questions
Why is density on a logarithmic scale?
Densities range from about 0.00009 g/cm³ for hydrogen gas to over 22 g/cm³ for osmium; on a linear scale almost every element would look the same.
Can I print it?
Yes. Use “Download PDF” for an A4 or A3 landscape poster with a colour legend.