Strangely enough, the idea that black nitrogen didn’t exist has long been considered a mystery. The periodic table is arranged in recurring “periods” where each column is made up of elements ...

The elements on the periodic table of elements are listed in ways that emphasize certain relationships. There are families, periods (the horizonal rows) and groups (the vertical columns).

Looking at the periodic table, most of us have no issues identifying the use of certain elements. Sodium, carbon, nitrogen, oxygen and others are no-brainers but what about the less talked about ...

Rayleigh thought this was because of a light impurity in the chemically produced nitrogen, but Ramsay believed there might be an unrecognised new element in the air. The periodic table devised by ...

The periodic table is getting an update. The International Union of Pure and Applied Chemistry announced that four new chemical elements have been assigned atomic numbers 113, 115, 117 and 118.

Fertilizers make plants grow by delivering nitrogen (and other elements, like phosphorus) in high-octane forms. Early farmers fertilized crops with urine or dung, usually scraped from "stables ...

Periodic table gets some flex Committee’s revisions give chemical isotopes their due By Rachel Ehrenberg December 21, 2010 at 4:02 pm ...