Francium — the 87th element on the periodic table — is a naturally occurring, but incredibly rare, radioactive element. It forms and decays extremely quickly, so it has no practical uses, and it is ...
Mlle. Marguerite Perey of the Curie Institute, Paris, discovered francium in 1939. It is the heaviest known member of the alkali metal series and occurs as a result of an alpha disintegration of ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results
Feedback