Name :  Francium
Symbol :  Fr
Atomic Number :  87
Atomic Weight :  223.0197
Specific Heat :  -
Melting Point :  27°C
Vaporization :  -
Boiling Point :  677°C
Electronegativity :  0.7
Density@293 K :  -
Discovered :  Marguerite Derey, France, 1939
Description :  Highly rare and unstable, radioactive metal.
Uses :  Since its isotopes have such short half-lives there are no commercially significant compounds of francium.