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 ...

That pun is based on the fact that the main building blocks in the branch of science are chemical elements, pure substances ...

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.

For example, Lead is a chemical element with the symbol Pb (from the Latin for lead, plumbum).W stands for tungsten (from the word wolfram) and Na stands for sodium (from the word natrium).

Helium has shown itself thus far as refractory as argon to all chemical combination ... Krl1ss and F. W. Schmid of the existence in one of the substances of a third element which has been called ...