The chemical element roentgenium is classed as a transition metal. It was discovered in 1994 by research scientists at the Heavy Ion Research Laboratory in Darmstadt, Germany.
Data Zone
| Classification: | Roentgenium is a transition metal |
| Color: | |
| Atomic weight: | (281), no stable isotopes |
| State: | solid (presumed) |
| Melting point: | |
| Boiling point: | |
| Electrons: | 111 |
| Protons: | 111 |
| Neutrons in most abundant isotope: | 170 |
| Electron shells: | 2,8,18,32,32,17,2 |
| Electron configuration: | [Rn] 5f14 6d9 7s2 |
| Density @ 20oC: |
Reactions, Compounds, Radii, Conductivities
| Atomic volume: | – |
| Structure: | – |
| Specific heat capacity | – |
| Heat of fusion | – |
| Heat of atomization | – |
| Heat of vaporization | – |
| 1st ionization energy | – |
| 2nd ionization energy | – |
| 3rd ionization energy | – |
| Electron affinity | – |
| Minimum oxidation number | – |
| Min. common oxidation no. | – |
| Maximum oxidation number | – |
| Max. common oxidation no. | – |
| Electronegativity (Pauling Scale) | – |
| Polarizability volume | – |
| Reaction with air | – |
| Reaction with 15 M HNO3 | – |
| Reaction with 6 M HCl | – |
| Reaction with 6 M NaOH | – |
| Oxide(s) | – |
| Hydride(s) | – |
| Chloride(s) | – |
| Atomic radius | – |
| Ionic radius (1+ ion) | – |
| Ionic radius (2+ ion) | – |
| Ionic radius (3+ ion) | – |
| Ionic radius (1- ion) | – |
| Ionic radius (2- ion) | – |
| Ionic radius (3- ion) | – |
| Thermal conductivity | – |
| Electrical conductivity | – |
| Freezing/Melting point: | – |
Roentgenium is named after Wilhelm Roentgen, who was awarded the first ever Physics Nobel Prize in 1901 for his discovery of x-rays.
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 and 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.
Uses of Actinium
Roentgenium is of research interest only.
Abundance and 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.
References
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