The Periodic Table is a well-organized chart that contains all 118 known elements in the universe. These elements are the ...

Copper has been used by humans for as much as 7000 years and elements such as gold, silver, tin, lead and mercury have ... line in the diagram of the periodic table above separates the metals ...

There are currently 118 known elements on the periodic table, and we've put 20 of them ... a very small part of the ...