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 ...

Substances have both physical and chemical properties. Developing the periodic table The periodic table was developed by grouping elements with similar properties. This, together with a later ...

Test your knowledge and compete with other Live Science readers to see who can come top in our periodic table quiz ... their ...

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 ...