Periodic table
Browse the table or search by name, symbol or atomic number. Each element opens with the key figures and the source.
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Element data from the PubChem periodic table, National Library of Medicine, retrieved 27 October 2026. NLM-created data is in the public domain.
Swipe sideways to see every group. Lanthanides and actinides sit in the rows under the main table.
Source: PubChem periodic table, National Center for Biotechnology Information, U.S. National Library of Medicine. Retrieved 27 October 2026. Information created by NLM is in the public domain; NLM asks for acknowledgment. Policy: NCBI copyright status. Group, period and block follow the standard table, with lanthanides 57–71 and actinides 89–103 in the rows below.
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How to use it
- Swipe the table sideways, or search for a name, symbol or number.
- Tap an element to open its data.
- Use the category chips to focus on one family, such as the halogens.
Where the figures come from
Names, symbols, atomic masses, electron configurations, electronegativity, radii, ionization energies, electron affinities, oxidation states, standard states, melting and boiling points, densities and discovery years come from the PubChem periodic table at the National Library of Medicine. The file was retrieved on 27 October 2026. Information created by NLM is in the public domain, and this page credits the National Library of Medicine.
Temperatures are in kelvin, radii in picometres, energies in electronvolts and density in grams per cubic centimetre, as PubChem lists them. Lanthanides and actinides sit in the two rows under the main table, and the gaps in group 3 mark their place. A blank property means PubChem leaves that field empty, which is common for the newest elements. A configuration marked predicted or calculated keeps that note from the source.
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The element list is saved with this page. The element you open stays on your device.
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Questions
Is every element included?
Yes. Hydrogen through oganesson is on the table, including the lanthanides and the actinides in the rows underneath.
Who published the data?
The National Library of Medicine, through the PubChem periodic table. NLM-created data is in the public domain. The credit and the retrieval date, 27 October 2026, are on this page.
Why is a melting point blank?
PubChem has no value in that field for some elements, especially the superheavy ones. The other fields still show whatever the source lists.
What do the group 3 gaps mean?
They mark where the lanthanide and actinide series belong. Tap the gap, or the matching row below, to open lanthanum or actinium.