While PubChem provides pages per chemical, one can find elements there too. Such pages are not suited for displaying information specific to elements (such as electronegativity and electron configuration). The PubChem Periodic Table and Element pages help users navigate the abundant chemical element data available within PubChem while providing a convenient entry point to explore additional information, such as bioactivities and health and safety data, available in PubChem Compound pages for specific elements and their isotopes. More detailed information on the Periodic Table and Element pages can be found in the following paper:


Kim S, Gindulyte A, Zhang J, Thiessen PA, Bolton EE. PubChem Periodic Table and Element pages: improving access to information on chemical elements from authoritative sources. Chemistry Teacher International. 2021 Mar 1; 3(1):57-65. doi:10.1515/cti-2020-0006.
[PubMed PMID: 34268481] [PubMed Central PMCID: PMC8276875] [Free Full Text]


PubChem Element page content comes from scientific articles and various authoritative data sources, such as the International Union of Pure and Applied Chemistry (IUPAC), National Institute of Standard and Technology (NIST), International Atomic Energy Agency (IAEA), Jefferson Laboratory, and Los Alamos National Lab. In addition, the Element page also contains curated data published in "IUPAC Periodic Table of the Elements and Isotopes (IPTEI) for the Education Community" (Holden et al., Pure and Applied Chemistry, 2018, 90(12), pp. 1833-2092).


The PubChem Periodic Table, available at the PubChem homepage, provides three distinct views. 

  • The Table View is the traditional periodic table that any scientist would instantly recognize.
  • The List View provides a summary view, allowing one to see all the properties available for each element at once.
  • The Game View is added as an educational feature, which helps test the user’s knowledge of the element names and symbols.


Clicking an element in the PubChem Periodic Table directs the user to the corresponding Element page. This page presents a wide variety of element information, including atomic properties (electron affinity, electronegativity, ionization potential, oxidation states, electron configuration, etc.) as well as isotopes, history, uses, and, most importantly, from where this information came from. The element page can also be reached directly via URLs that includes atomic number, symbol, or name (all case-insensitive). For example, the following URLs are for the Element page for carbon:






The PubChem Periodic Table and Element pages are also available as widgets, which enable web developers to display PubChem’s element data on web pages they design. The elemental data can be downloaded in common file formats and imported into data analysis programs (e.g., spreadsheet software, like Microsoft Excel and Google Sheets, and computer scripts, such as python and R). In addition, the data presented in the Periodic Table and Element pages are also available through programmatic access, using PUG-REST and PUG-View.


Overall, the PubChem Periodic Table and Element pages improve access to chemical element data from authoritative sources.


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