Francium
Symbol
Fr
Atomic Number
87
Atomic Weight
223.0197
Element Classification
Discovered By
Marguerite Derey
Discovery Date
1939 (France)
Name Origin
Named for France, the nation of its discovery.
Density(g/cc)
n/a
Melting Point
300
Boiling Point(K)
950
Appearance
n/a
Atomic Radius(pm)
n/a
Atomic Volume(cc/mol)
n/a
Covalent Radius(pm)
n/a
Ionic Radius
180 (+1e)
Specific Heat
n/a
Fusion Heat
15
Evaporation Heat(kj/mol)
n/a
Thermal Conductivity(@25°C W/m K)
n/a
Debye Temperature
n/a
Pauling Negativity Number
0.7
First Ionizing Energy(kj/mol)
~375
Oxidation States
1
Electronic Configuration
[Rn] 7s1
Lattice Structure
Body-Centered Cubic(BCC)
Lattice Constant
n/a
Lattice C/A Ratio
n/a
