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 ...

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 ...

That pun is based on the fact that the main building blocks in the branch of science are chemical elements, pure substances ...

Watch this video to find out more information on the periodic table close ... and show trends. The table below shows the melting points of most elements in group 1. Melting points are a physical ...