Can you name everything from Ac to Zr? Test your knowledge of the periodic table and see if you can top the leaderboard ...

The periodic table of chemical elements, often called the periodic table, organizes all discovered chemical elements in rows (called periods) and columns (called groups) according to increasing atomic ...

The modern version of this chemical element chart has been tweaked to account for the quantum theory that governs the arrangement of electrons surrounding the nucleus and the outermost electrons that ...

In this excerpt from "Mendeleyev’s Dream: The Quest for the Elements," author Paul Strathern describes the state of science in the 19th century, and the growing hope that chemistry could explain ...

The element 112 has been officially recognized as a new element by the International Union of Pure and Applied Chemistry (IUPAC). IUPAC confirmed the recognition of element 112 in an official ...

Over 1000 different periodic tables have been proposed since Mendeleev originated the idea 150 years ago. If nature is one, shouldn’t there be ONE periodic table? The 4D Periodic Table of Chemical ...

In honor of the International Year of the Periodic Table of Chemical Elements (IYPT), C&EN partnered with ACS on Campus to host a periodic table pub trivia event during the American Chemical ...

Sunscreen protects skin from sunburn, signs of aging, and skin cancer. Mineral and chemical sunscreens both protect your skin ...

Organization of the Periodic Table: Periods and families in the periodic table are described. Students learn to determine the number of energy levels and valence electrons in an atom of an element ...

At the far end of the periodic table is a realm where nothing is quite as it should be. The elements here, starting at atomic number 104 (rutherfordium), have never been found in nature. In fact ...

The periodic table of chemical elements, often called the periodic table, organizes all discovered chemical elements in rows (called periods) and columns (called groups) according to increasing atomic ...