But the periodic table didn’t actually start with Mendeleev. Many had tinkered with arranging the elements. Decades before, chemist John Dalton tried to create a table as well as some rather ...

Iodine is an essential element - without which we would suffer severe developmental problems - and yet most of us have no idea how much we need, or where it comes from. In Their Element: Awesome ...

The periodic table arranges all the chemical elements in a specific way. Patterns are visible in the way that elements behave, and this allows us to make predictions about other elements. Gethin: And ...