The periodic table is a well-organized chart that contains all the known elements in the universe. These elements are ...

Watch this video to find out more information on the periodic table close periodic tableA table which lists all of the chemical elements and arranges them in a way that is useful. It allows us to ...

These are almost one-quarter of the periodic table and are mainly found in the first four periods. Of these, 11 are essential elements that our bodies need in larger amounts: oxygen, carbon ...