Homework Help    Search   Site Map Biology      Physics      Chemistry      Maths     History    Links

Search  

Back To Periodic Table

Check out our latest service -Dictionary Of Computer Abbreviations (DOCA) today. Over 5000 words are there in our database.The largest free online computer abbreviation dictionary.

Radium

Ra
Atomic Number:
Atomic Weight:
Element Type:
Crystal Structure:
Melting Point:
Boiling Point:
Critical Temp:
Atomic Radius:
Covalent Radius:
Electronegativity:
88
-226.0
Alkali Earth Metal
Cubic Body Centered
700.0°C = 1292.0°F = 973.15 K
°C = °F = K
°C = °F = K
Å (Å = Angstrom = 10-10 m)
Å
0.9

Discovery

(L. radius, ray) Radium was discovered in 1898 by Mme. Curie in the pitchblende oruraninite of North Bohemia, where it occurs. There is about 1 g of radium in 7 tons ofpitchblende. The element was isolated in 1911 by Mme. Curie and Debierne by; theelectrolysis of a solution of pure radium chloride, employing a mercury cathode; ondistillation in an atmosphere of hydrogen this amalgam yielded the pure metal.

Sources

Originally, radium was obtained from the rich pitchblende ore found in Joachimsthal,Bohemia. The carnotite sands of Colorado furnish some radium, but richer ores are found inthe Republic of Zaire and the Great Lake region of Canada. Radium is present in alluranium minerals, and could be extracted, if desired, from the extensive wastes of uraniumprocessing. Large uranium deposits are located in Ontario, New Mexico, Utah, Australia,and elsewhere.


Best Sites For Teachers
Teach Nology
    Chemistry      Maths    History    Science News      Contact Us      Web Board  
Your Best BuyCool Unique Gift IdeasDiscount FurnitureInspirationPrivacy PolicyTerms Of Use Credits