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 colors of rubies and emeralds are so striking that they define shades of red and green—ruby red and emerald green. But ...

Keeping up with the neighbours is rarely a concern in the periodic table. Nitrogen doesn't care much what carbon and oxygen are up to, and rarely casts covetous glances at phosphorous. But there's at ...

Although Mendeleev's periodic table was still almost a century away at this time ... bright yellow sodium chromate, brilliant chrome green (that's chrome(III) oxide), light blue chromium(II) chloride, ...

Take your pick from this collection of links about elements and the periodic table! Build an element ball ... we might be able to determine the real culprit. The green chemistry principle of atom ...