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| 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. |
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Radium
Atomic Structure of Radium
Atomic Radius:
Atomic Volume: 45.2cm3/mol
Covalent Radius:
Cross Section (Thermal Neutron Capture) 
a/barns: 12.8
Crystal Structure: Cubic body centered
Electron Configuration:1s2
2s2p6
3s2p6d10
4s2p6d10f14
5s2p6d10
6s2p6
7s2
Electrons per Energy Level: 2,8,18,32,18,8,2
Shell Model
Ionic Radius: 1.43Å
Filling Orbital: 7s2
Number of Electrons (with no charge): 88
Number of Neutrons (most common/stable nuclide): 138
Number of Protons: 88
Oxidation States: 2
Valence Electrons: 7s2
Electron Dot Model
Chemical Properties of Radium
Electrochemical Equivalent: 4.2165g/amp-hr
Electron Work Function:
Electronegativity: 0.9 (Pauling); 1 (Allrod Rochow)
Heat of Fusion: 37kJ/mol
Incompatibilities:
Ionization PotentialFirst: 5.279Second: 10.148
Valence Electron Potential (-eV): 20.1
Physical Properties of Radium
Atomic Mass Average: 226.0254
Boiling Point: 1809K 1536°C 2797°F
Coefficient of lineal thermal expansion/K-1: N/A
ConductivityElectrical: Thermal: 0.186 W/cmK
Density: 5.5g/cc @ 300K
Description:Silver white iIntensely radioactive metal found uranium ores.
Enthalpy of Atomization: 163 kJ/mole @ 25°C
Flammablity Class:
Freezing Point: see melting point
Heat of Vaporization: kJ/mol
Melting Point: 973K 700°C 1292°F
Molar Volume: 39 cm3/mole
Physical State (at 20°C & 1atm): Solid
Specific Heat: 0.12J/gK
Vapor Pressure = 327Pa@700°C
Regulatory / Health
CAS Number
7440-14-4
NFPA 704Health: Fire: Reactivity: Special Hazard: Radioactive
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Radium Menu
Radium Page One
Overview of Radium
Radium's Name in Other Languages
Atomic Structure of Radium
Chemical Properties of Radium
Physical Properties of Radium
Regulatory / Health
Who/When/Where/How
Radium Page Two
Nuclides / Isotopes
Potential Parent Nuclides
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