|
111
Rg
(281)
|
Roentgenium is named after Wilhelm Roentgen, who was awarded the first ever Physics Nobel Prize in 1901 for his discovery of x-rays.
| Classification: | Roentgenium is a transition metal |
| Color: | |
| Atomic weight: | (281), no stable isotopes |
| State: | solid (presumed) |
| Melting point: | |
| Boiling point: | |
| Shells: | 2,8,18,32,32,17,2 |
| Electron configuration: | [Rn] 5f14 6d9 7s2 |
| Density @ 20oC: | |
| Atomic volume: | |
| Structure: |
Discovery of Roentgenium
Roentgenium was first made by research scientists at the Heavy Ion Research Laboratory in Darmstadt, Germany in 1994.
The scientists bombarded nickel-64 with bismuth-209 in a heavy ion accelerator.
The element is named after physicist Wilhelm Conrad Röntgen who discovered X-rays in 1895.
Appearance & Characteristics
Harmful effects:
Roentgenium is harmful due to its radioactivity.
Characteristics:
Roentgenium is a synthetic radioactive metal and has only been produced in minute amounts.
Roentgenium is of research interest only.
Roentgenium is harmful due to its radioactivity.
Characteristics:
Roentgenium is a synthetic radioactive metal and has only been produced in minute amounts.
Roentgenium
Roentgenium is of research interest only.
Abundance & Isotopes
Abundance earth's crust: nil
Abundance solar system: parts per billion by weight, parts per trillion by moles
Cost, pure: $ per 100g
Cost, bulk: $ per 100g
Source: Roentgenium is a synthetic radioactive metal, created via nuclear bombardment, and has only been produced in minute amounts. Roentgenium is produced by bombarding 209Bi with 64Ni in a heavy ion accelerator.
Isotopes: Roentgenium has 7 isotopes whose half-lives are known, with mass numbers from 272 to 282. None are stable. The most stable isotope is 281Rg, with a half-life of 23 seconds.
Abundance solar system: parts per billion by weight, parts per trillion by moles
Cost, pure: $ per 100g
Cost, bulk: $ per 100g
Source: Roentgenium is a synthetic radioactive metal, created via nuclear bombardment, and has only been produced in minute amounts. Roentgenium is produced by bombarding 209Bi with 64Ni in a heavy ion accelerator.
Isotopes: Roentgenium has 7 isotopes whose half-lives are known, with mass numbers from 272 to 282. None are stable. The most stable isotope is 281Rg, with a half-life of 23 seconds.
Energies
Specific heat capacity: J g-1 K-1
Heat of fusion: kJ mol-1
1st ionization energy: kJ mol-1
3rd ionization energy: kJ mol-1
Heat of fusion: kJ mol-1
1st ionization energy: kJ mol-1
3rd ionization energy: kJ mol-1
Heat of atomization: kJ mol-1
Heat of vaporization : kJ mol-1
2nd ionization energy: kJ mol-1
Electron affinity: kJ mol-1
Heat of vaporization : kJ mol-1
2nd ionization energy: kJ mol-1
Electron affinity: kJ mol-1
Oxidation & Electrons
Shells: 2,8,18,32,32,17,2
Minimum oxidation number:
Min. common oxidation no.:
Electronegativity (Pauling Scale):
Minimum oxidation number:
Min. common oxidation no.:
Electronegativity (Pauling Scale):
Electron configuration: [Rn] 5f14 6d9 7s2
Maximum oxidation number:
Max. common oxidation no.:
Polarizability volume: Å3
Maximum oxidation number:
Max. common oxidation no.:
Polarizability volume: Å3
Reactions & Compounds
Reaction with air:
Reaction with 15 M HNO3:
Oxide(s):
Hydride(s):
Reaction with 15 M HNO3:
Oxide(s):
Hydride(s):
Reaction with 6 M HCl:
Reaction with 6 M NaOH:
Chloride(s):
Reaction with 6 M NaOH:
Chloride(s):
Radius
Atomic radius: pm
Ionic radius (2+ ion): pm
Ionic radius (2- ion): pm
Ionic radius (2+ ion): pm
Ionic radius (2- ion): pm
Ionic radius (1+ ion): pm
Ionic radius (3+ ion): pm
Ionic radius (1- ion): pm
Ionic radius (3+ ion): pm
Ionic radius (1- ion): pm
Conductivity
Thermal conductivity: W m-1 K-1
Electrical conductivity: x 106 S m-1
References
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