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 even test your elements knowledge by playing a periodic table game!

Explore how atomic radius 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.

Periodic Table element Summary Mercury. Mercury is a chemical element with symbol Hg and atomic number 80. Classified as a transition metal, Mercury is a liquid at room temperature.

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

Periodic Table element Summary Gold. Gold is a chemical element with symbol Au and atomic number 79. Classified as a transition metal, Gold is a solid at room temperature.

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 room temperature.

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

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 room temperature.

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