More serious ambitions to do something in chemistry started at high school with a crazy chemistry teacher, Mr Griffioen, who looked exactly like Mendeleev. Professor Sjoerd Harder Professor Harder’s ...

A Russian scientist called Dmitri Mendeleev produced one of the first practical periodic tables in the nineteenth century. The modern periodic table is based closely on the ideas he used.

A Russian scientist called Dmitri Mendeleev produced one of the first practical periodic tables in the nineteenth century. The modern periodic table is based closely on the ideas he used.