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 zigzag, staircase, line in the diagram of the periodic table above separates ... Hydrogen is a non-metal, but it is often put in the middle. Notice that most elements are metals, rather ...

There are currently 118 known elements on the periodic table, and we've put 20 of them below to create a brain game that ...

Spraying Windex onto the samples produces a color that depends on the metal residing in the dirt. By comparing colors across samples ... As part of the ChemClub's 10 th Anniversary, we asked clubs to ...