So how has the periodic table been put together? Mrs Roberts: Well, the modern periodic table shows ... with the element caesium four places down having a melting point of 28°C.

The vis tellurique from De Chancourtois’s original publication (right) and a copy drawn out with modern symbols (left ... However, he is remembered for his search for a pattern in inorganic chemistry.

Thus, in the modern ... of The Periodic Table, may also represent its heyday. Currently, the seventh period of the periodic table has been completed, with the recent addition of four elements ...