| Symbol |
Fr |
|
| Atomic Number |
87 |
Relative Atomic Mass
12C = 12.0000 |
223.0197 (223Fr) |
Atomic Radius
pm |
c. 270 |
First Ionisation Energy
kJ mol-1 |
400 |
| Electronegativity |
0.7 |
Density
kg m-3 |
n/a |
Molar Volume
cm3 |
n/a |
Thermal Conductivity
W m-1 K-1 |
15 [300 K] (est.) |
Melting Point
K |
300 |
Boiling Point
K |
950 |
| Number of Isotopes |
30 |
Ground State Electron
Configuration |
[Rn]7s1 |
| Term Symbol |
2S1/2 |
| Discovery |
Discovered by M. Perey (Paris, France) in 1939 |
| Name Derived From |
Named after France |
Name in Other
Languages |
 Croatian | Francij |
 Danish | francium |
 Dutch | francium |
 Finnish | frankium |
 French | francium |
 German | Francium |
 Italian | francio |
 Norwegian | francium |
 Portuguese | frāncio |
 Spanish | francio |
 Swedish | francium |
| Peter van der Krogt's Element Multidict - element name translations in over 48 langauges |
