Interactive periodic table with up-to-date element property data collected from authoritative sources. Look up chemical element names, symbols, atomic masses and other properties, visualize trends, or …

As we mark the 150th anniversary of the periodic table, the scientific community has declared 2019 to be “The International Year of the Periodic Table”. PubChem is celebrating by launching the …

Periodic Table of Elements - PubChem Periodic Table of Elements

Explore how electronegativity changes with atomic number in the periodic table of elements via interactive plots.

Explore how atomic mass changes with atomic number in the periodic table of elements via interactive plots.

PubChem is the world's largest collection of freely accessible chemical information. Search chemicals by name, molecular formula, structure, and other identifiers. Find chemical and physical properties, …

Chemical element, Lead, information from authoritative sources. Look up properties, history, uses, and more.

Chemical element, Hydrogen, information from authoritative sources. Look up properties, history, uses, and more.

Chemical element, Magnesium, information from authoritative sources. Look up properties, history, uses, and more.

Chemical element, Aluminum, information from authoritative sources. Look up properties, history, uses, and more.