Later he worked at an agricultural college trying to find patterns of behaviour in organic chemistry. However, he is remembered for his search for a pattern in inorganic chemistry. Just four years ...

The modern periodic table The periodic table is a way of organising the elements which is used by scientists to group elements with similar properties. It has a unique arrangement of rows and columns.

Copper has been used by humans for as much as 7000 years ... called Dmitri Mendeleev produced one of the first practical periodic tables. He wrote the properties of the elements on pieces of ...