About Elements

Elements is a free periodic table for students, teachers and anyone curious. It has one page for each of the 118 elements, pages for the ten families, a list you can sort, records, a molar mass calculator and a symbol quiz.

Where the data comes from

The figures (atomic mass, electron configuration, electronegativity, atomic radius, ionisation energy, electron affinity, oxidation states, state, melting point, boiling point, density, family and year of discovery) come from the PubChem Periodic Table of the U.S. National Library of Medicine, National Institutes of Health. PubChem data is in the public domain. Our copy was downloaded on 11 November 2026.

We changed four discovery years where PubChem's entry does not give the year the element itself was first isolated: fluorine (1886), aluminium (1825), silicon (1824) and calcium (1808). Discovery dates for some elements differ between reference books, because finding, isolating and confirming an element were often separate events.

Period, group, block, electrons per shell, temperature conversions, rankings and the number of atoms in a gram are worked out by us from that data. The spellings aluminium and caesium follow IUPAC and Indian usage; PubChem writes aluminum and cesium.

The descriptions of each element, its uses, the origin of its name, and all the explanations are written by us. The shell diagrams are drawn by this site and are a simple model.

How to use it for study

The site is meant to support your textbook, not to replace it. Values such as melting points can differ slightly between sources. For an examination, use the figures your board or textbook gives.

Who makes it

This site is part of ShareYourGroup, a family of free sites about the things people share, send and do together. It is free to use and needs no login. Advertisements pay for the hosting and the work.

Found a mistake?

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