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, …

Periodic Table element Summary Technetium. Technetium is a chemical element with symbol Tc and atomic number 43. Classified as a transition metal, Technetium is a solid at room …

Periodic Table element Summary Berkelium. Berkelium is a chemical element with symbol Bk and atomic number 97. Classified as an actinide, Berkelium is a solid at room temperature.

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 Curium. Curium is a chemical element with symbol Cm and atomic number 96. Classified as an actinide, Curium is a solid at room temperature.

Periodic Table element Summary Rutherfordium. Rutherfordium is a chemical element with symbol Rf and atomic number 104. Classified as a transition metal, Rutherfordium is a solid at …

Periodic Table element Summary Neptunium. Neptunium is a chemical element with symbol Np and atomic number 93. Classified as an actinide, Neptunium is a solid at room temperature.

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 …

Explore how boiling point 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.