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Roentgenium


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Atomic symbol: Rg
Atomic number: 111
Atomic weight: 280
Atomic volume: ?
Density: Unknown
Period Number: 7
Group number: 11
Group name: none
Element classification: Metal


States


Phase at room temperature: Expected to be a Solid
Melting Point: Unknown
Boiling point: Unknown
Heat of fusion: ?
Heat of vaporization: ?


Energies


Ionization Energy: Unknown
1st ionization energy: ?
2nd ionization energy: ?
3rd ionization energy: ?
Electronegativity: ?
Electron affinity: ?
Specific heat: ?
Heat atomization: ?


Oxidation & Electrons


Shells: ?
Electron Shell Configuration: ?
Minimum oxidation number: ?
Maximum oxidation number: ?
Minimum common oxidation number: ?
Maximum common oxidation no: ?


Appearance & Characteristics


Structure:: ?
Color: ?
Hardness: ?
Toxicity: ?
Characteristics: ?
Uses: ?


Reactions


Reaction with air: ?
Reaction with 6M HCl: ?
Reaction with 15M HNO3: ?
Reaction with 6M NaOH: ?


Other Forms


Number of isotopes: 0
Oxide(s): ?
Hydride(s): ?
Chloride(s): ?


Radius


Atomic Radius: ?
Ionic radius (1- ion): ?
Ionic radius (1+ ion): ?
Ionic radius (2- ion): ?
Ionic radius (2+ ion): ?
Ionic radius (3+ ion): ?


Conductivity


Thermal conductivity: ?
Electrical conductivity: ?
Polarizability: ?


Abundance


Source: ?
Relative abundance solar system: ?
Abundance earth's crust: ?
Estimated crustal abundance: Not Applicable
Estimated oceanic abundance: Not Applicable
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 


History


Roentgenium was first produced by Peter Armbruster, Gottfried Münzenber and their team working at the Gesellschaft für Schwerionenforschung in Darmstadt, Germany in late 1994. They bombarded atoms of bismuth-209 with ions of nickel-64 with a device known as a linear accelerator. This produced three atoms of roentgenium-272, an isotope with a half-life of about 1.5 milliseconds (0.0015 seconds), and a free neutron.

Roentgenium's most stable isotope, roentgenium-280, has a half-life of about 3.6 seconds. It decays into meitnerium-276 through alpha decay.

Since only a few atoms of roentgenium have ever been produced, it currently has no uses outside of basic scientific research.

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