Francium - a radioactive alkali metal which occurs very rarely in nature.
Symbol:
Fr
Atomic Number: 87
Atomic Weight: 223 (most stable)
Boiling Point: 950 K
Melting Point: 300 K
Density at 300K: ??? g/cm
3
Covalent radius: ???
Atomic radius: ???
Atomic
volume: ??? cm
3/mol
First
ionization potental: ??? V
Specific heat capacity: ??? Jg
-1K
-1
Thermal conductivity: 15 Wm
-1K
-1
Electrical conductivity: ???*10
6Ω
-1m
-1
Heat of fusion: 2.1 kJ/mol
Heat of vaporization: 64 kJ/mol
Electronegativity: 0.7 (Pauling's)