Explore the periodic table! Discover the history and key facts about each element, including atomic number, mass, symbol, and the scientists who discovered them.

Actinides are a group of heavy, radioactive elements that include uranium, plutonium, americium, curium, berkelium and ...

Plutonium (Pu) exhibits one of the most diverse and complex chemistries of any element in the periodic table. Since its discovery in 1940, scientists have synthesized and studied many different types ...

On 17 February 1869, Russian chemist Dmitri Mendeleev jotted down the symbols for the chemical elements, putting them in order according to their atomic weights and inventing the periodic table. He ...

A mathematical equivalent of a microscope with variable resolution has shed light on why some atoms are exceptionally stable, a riddle that has persisted in nuclear physics for decades ...

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Phelps, an engineer at Oak Ridge National Laboratory, works with radioactive material daily, furthering understanding of the world around us. She is best known for helping discover a periodic element, ...

Can you remember all 118 elements in the periodic table without looking at the answers?