Element Properties, Isotopic Compositions for Radium
Radium (Ra) Element Properties
Atomic Mass 226.0254
Atomic Number 88
Name Origins Latin, radius = "ray"
Year Discovered 1898
Discovery Credits Pierre and Marie Curie at Paris, France.
Remarks Radioactive element found naturally in
uranium and thorium ores. Silvery, lustrous, soft. Annual production 100
gm. Formerly used in cancer therapy and for luminous paint, both uses are now
rare. Reacts with oxygen and water.
References Emsley, J., 1991;
THE ELEMENTS : Sec. Ed., Clarendon Press, Oxford, 251 p.
See Also WebElements ,
ChemiCool
Naturally Occurring Isotopes
Symbol Isotope Mass Isotope Nuclide Number Isotope Number Natural Abundance Half-life Half-life Units Decay Mode Decay Mode MeV Decay Mode %
Ra 223.018501 223 88 Trace 11.43 Days alpha 5.979 100.0%
Ra 224.020186 224 88 Trace 3.66 Days alpha 5.789 100.0%
Ra 226.025402 226 88 Trace 1,600 Years alpha 4.78 100.0%
Ra 228.031064 228 88 Trace 5.75 Years beta - 0.045 100.0%
Radium (Ra) Minerals sorted by Mineral Name Click here for List sorted by Weight Percent
1 Minerals containing Radium (Ra) sorted by Mineral Name
% Ra Mineral Name Chemical Formula MW
0.01 % Ra
Radiobarite *(Ba,Ra
233.40
( Bold - Valid Mineral Name )
