| WebElements__Radium Extensive information on history, uses, occurrence, compounds, and properties. |
| Wikipedia__Radium Properties of the element, including its history, applications, and charateristics. |
| Radiochemistry_of_Radium Full text of the monograph by Murrell L. Salutsky (W.R. Grace & Co., Research Division, Washington Research Center, Clarksville, Maryland) and H. W. Kirby (Mound Laboratory, Miamisburg, Ohio). [PD |
| ChemicalElements_com__Ruthenium Basic information, atomic structure, and table of isotopes. |
| EnvironmentalChemistry_com__Ruthenium Atomic structure, chemical and physical properties, and table of nuclides. |
| It\'s_Elemental__Ruthenium Basic physical and historical information. |
| LANL__Ruthenium History, sources, uses, and properties. |
| Lenntech__Ruthenium Physical data, chemical properties, and health effects. |
| Ruthenium Data tables and historic information. |
| Visual_Elements__Ruthenium Image, discovery, uses, source, and physical information. |
| WebElements__Ruthenium Extensive information on history, uses, occurrence, compounds, and properties. |
| Wikipedia__Ruthenium Properties of the element, including its history, applications, and characteristics. |
| Addresses_of_Coptologists Contact information, including email addresses, of Coptologists, from the International Association for Coptic Studies. |
| Adkins,_Lesley_and_Roy Archaeologists and authors of The Keys of Egypt and other books on archaeology, history and hieroglyphs. |
| Bankes,_William_John_(1786-1855) A biography of the explorer who traveled to Egypt and Nubia in the early 19th century and became an early Egyptian epigrapher. |
| Bell,_Lanny Professor of Egyptology at Brown University. Photograph, interests and publications. |
| Brovarski,_Edward Professor of Egyptology at Brown University. Interests and publications. |
| Depuydt,_Leo Associate Professor at Brown University, interested in Egyptian history and grammar. Photograph and publications. |
| Directory_of_Institutions_and_Scholars_Involved_in_Demotic_Studies Extensive list with contact information from the Oriental Institute, University of Chicago. |
| Directory_of_North_American_Egyptologists Find individuals, institutions, and dissertations relating to American Egyptology. Sponsored by Oriental Institute of the University of Chicago and the University of Arizona Egyptian Expedition. |
| Dodson,_Aiden Profile of this University of Bristol Visiting Fellow. Research interests include Egyptian funerary archaeology, dynastic history, and the history of Egyptology. |
| Email_Addresses_of_Australian_Egyptologists Listed alphabetically. |
| Fildes,_Alan Articles, photo gallery, and links from this specialist in the Old Kingdom with a particular interest in pyramid sites and their related mastaba fields. |
| Gardiner,_Alan_(1879-1963) Biography of one of the premier Egyptologists of the early twentieth century. |
| Lesko,_Leonard_H_ Charles Edwin Wilbour Professor of Egyptology and Chairman of the Department of Egyptology at Brown University. Biographical information as well as interests and publications. |
| Naville,_Henri_Edouard_(1844-1926) Profile of this University of Geneva professor who was the vice-president of the Egypt Exploration Society and a Foreign Associate of the Institute of France. |
| Piccione,_Peter_A_ Assistant Professor of Comparative Ancient History, University of Charleston. Photographs and biographical abstract of this Egyptologist. |
| Redford,_Donald Curriculum vitae of the Professor of Classics and Ancient Mediterranean Studies, Penn State University. |
| Romer,__John Photographs, brief biography and bibliography of the Egyptologist and television documentary maker, with related links. |
| Ryan,_Donald_P_ Archaeologist at the Pacific Lutheran University who has directed several seasons of fieldwork in the Valley of the Kings. Photograph, research interests and projects. |
| Werner,_Edward_K_ Assistant Director, St. Lucie County Library System. Brief autobiography and publication list of this Egyptologist and librarian. |
| Winlock,_Herbert_E__(1884-1950) An illustrated biography of this American Egyptologis from the Giants of Egyptology series in Kmt: A Modern Journal of Ancient Egypt. |
| The_Sheikh_of_Archaeology_wins_Best_Book_Award_for_1999 From ArabicNews, Hassan Al-Basha won the best book award in the area of dictionaries and encyclopedias for his encyclopedia of architecture, archaeology and Islamic arts. (November 5, 2001) |
| ChemicalElements_com__Yttrium Basic information, atomic structure, and isotopes. |
| The_Columbia_Encyclopedia__Yttrium Overview for the general reader. |
| EnvironmentalChemistry_com__Yttrium Atomic structure, chemical and physical properties, and table of nuclides. |
| It\'s_Elemental__Yttrium Basic physical and historical information. |
| LANL__Yttrium History, sources, properties, uses, and isotopes. |
| Lenntech__Yttrium Physical data, chemical properties, health and environmental effects. |
| Visual_Elements__Yttrium Image, animation, uses, physical information, and ionisation energies. |
Basic Information | Atomic Structure | Isotopes | Related Links | Citing This Page ![[Bohr Model of Radium]](http://www.chemicalelements.com/elements/ra.html/../bohr/b0088.gif)
Number of Energy Levels: 7First Energy Level: 2Second Energy Level: 8Third Energy Level: 18Fourth Energy Level: 32Fifth Energy Level: 18Sixth Energy Level: 8Seventh Energy Level: 2IsotopesIsotopeHalf LifeRa-22238.0 secondsRa-22311.43 daysRa-2243.66 daysRa-22514.9 daysRa-2261600.0 yearsRa-2285.76 yearsFactsDate of Discovery: 1898Discoverer: Pierre and Marie CurieName Origin: From the Latin word radius (ray)Uses: treating cancerObtained From: uranium oresRelated LinksNone available.MLA Format for Citing This PageBentor, Yinon. Chemical Element.com - Radium. <http://www.chemicalelements.com/elements/ra.html>. For more information about citing online sources, please visit the MLA's Website. This page was created by Yinon Bentor. Use of this web site is restricted by this site's license agreement. Copyright © 1996-2006 Yinon Bentor. All Rights Reserved. 