Eric Scerri recounts the story of element 87, which after a number of ... by Mendeleev in 1871 and given the provisional name 'eka-caesium'. It was recognized early on that the periodic table ...

The melting points then get gradually lower, with the element caesium four places down having a melting point of 28°C. A hypothesis is a suggestion or prediction made on the basis of some evidence.

When Mendeleev first proposed his periodic table in 1869 he left gaps for elements not yet discovered, but that he predicted should exist. One such gap was one beneath caesium, a position later found ...

Although it is chemically interesting, the element has relatively few commercial applications at present, but the amount of research activity suggests many possibilities exist. One current use is in ...