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, …

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 …

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

Periodic Table element Summary Lead Lead is a chemical element with symbol Pb and atomic number 82. Classified as a post-transition metal, Lead is a solid at 25°C (room temperature).

Periodic Table element Summary Oxygen Oxygen is a chemical element with symbol O and atomic number 8. Classified as a nonmetal, Oxygen is a gas at 25°C (room temperature).

Periodic Table element Summary Roentgenium Roentgenium is a chemical element with symbol Rg and atomic number 111. Classified as a transition metal, Roentgenium is a expected to be …

https://www.nist.gov/pml/database-disclaimer Cesium https://physics.nist.gov/cgi-bin/Elements/elInfo.pl?element=55 IUPAC Periodic Table of the Elements and Isotopes …

Periodic Table element Summary Sulfur Sulfur is a chemical element with symbol S and atomic number 16. Classified as a nonmetal, Sulfur is a solid at 25°C (room temperature).

Periodic Table element Summary Bismuth Bismuth is a chemical element with symbol Bi and atomic number 83. Classified as a post-transition metal, Bismuth is a solid at 25°C (room …