PARIS (AP) — In a story Jan. 30 about the periodic table, The Associated Press erroneously reported the year it was first published. The periodic table was first published in 1869, not 1969. A ...

A chemical element is one of those squares on the periodic table that adorns many a classroom wall. Sure. But what is an element really? It is a more subtle question that you might realise. To get to ...

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 ...

Like everything we see in the world, isotopes are a type of atom, the smallest unit of matter that retains all the chemical properties of an element. Isotopes are forms of a chemical element with ...

A new model rectifies the long-standing deficiencies of the electronegativity concept. Researchers from Skoltech have developed a simple, universal formula that accurately predicts the chemical ...