Present the periodic table without warning to a room full of people and the reactions are likely to be diverse. There’ll be those whose faces break instantly into expressions of warm recognition, with ...

The first extrasolar planets (exoplanets) were discovered in 1992 by Arecibo Observatory. Orbiting around a fast-rotating neutron star named the Lich Pulsar, they were three small planets named Draugr ...

The periodic table of the chemical elements is a tabular method of displaying the chemical elements, first devised in 1869 by the Russian chemist Dimitri Mendeleev. Mendeleev intended the table to ...

Two weeks ago, we showed off our favorite entries in C&EN’s “I Spy a Periodic Table” photo contest. And we gave readers a chance to pick a favorite of their own in an online poll. It was a tight race, ...

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 periodic table is part of the bedrock of chemistry education. Students use it to look up values like an element’s atomic mass, and it serves as a visual reference for the trends in physical ...

Electronegativity, an essential characteristic of all elements in the periodic table, measures an atom's ability to attract electrons towards itself within a chemical bond. This vital theoretical ...

Measurements of an artificial radioactive element called lawrencium could revive an arcane controversy over the element’s position in the periodic table — and the structure of the table itself. An ...