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 ... line in the diagram of the periodic table above separates the metals, on the left, from non ...

The periodic table - AQA Mendeleev made an early periodic table. In the modern periodic table, elements are in order of atomic number in periods and groups. Electronic structures model how ...