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Periodic Table - Elements - Radium
| Symbol |
Ra |
|
| Atomic Number |
88 |
Relative Atomic Mass
12C = 12.0000 |
226.0254 (226Ra) |
Atomic Radius
pm |
223 |
First Ionisation Energy
kJ mol-1 |
509.3 |
| Electronegativity |
0.89 |
Density
kg m-3 |
c. 5000 [293 K] |
Molar Volume
cm3 |
45.2 |
Thermal Conductivity
W m-1 K-1 |
18.6 [300 K] (est.) |
Melting Point
K |
973 |
Boiling Point
K |
1413 |
| Number of Isotopes |
25 |
Ground State Electron
Configuration |
[Rn]7s2 |
| Term Symbol |
1S0 |
| Discovery |
Discovered by P. Curie and M. Curie (Paris, France) in 1898. Isolated by M. Curie in 1911 |
| Name Derived From |
Latin radius meaning 'ray' |
Name in Other
Languages |
 Croatian | Radij |
 Danish | radium |
 Dutch | radium |
 Finnish | radium |
 French | radium |
 German | Radium |
 Italian | radio |
 Norwegian | radium |
 Portuguese | rádio |
 Spanish | radio |
 Swedish | radium |
| Peter van der Krogt's Element Multidict - element name translations in over 48 langauges |
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Page compiled: Wed Sep 05 18:37:55 GMT+01:00 2001
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