The periodic table organizes chemical elements based on atomic weight, electron configurations, and chemical properties, ...

Mendeleev discovered the periodic table (or Periodic System, as he called it ... certain types of element regularly occurred. For example, a reactive non-metal was directly followed by a very reactive ...

Like gold and silver, platinum and palladium serve as investments that can help you hedge against inflation. However, ...

Copper has been used by humans for as much as 7000 years and elements such as gold, silver, tin, lead and mercury have been known for many thousands of years. However, the first scientific ...

Lithium batteries are in the news constantly. But lithium has plenty of other uses. It's a drug for bipolar disorder. It used ...

Like all noble gases, xenon is colourless, odourless and inflammable — but it is also more reactive ... elements of group 18 have lived in relative obscurity. In 1869, Mendeleev's first periodic ...