PERIODIC ELEMENT
Fr (Francium)

 



Atomic number : 87
Atomic mass : 233 g.mol-1
Electronegativity according to Pauling : 0.7
Density : unknown
Melting point : 27 °C
Boiling point : 677 °C
Vanderwaals radius : unknown
Ionic radius : unknown
Isotopes : 4
Electronic shell : [Rn] 7s1
Discovered by : Marguerite Perey in 1939
Atomic Structure Uses (No uses known )