English
French
Croatian
German
Italian
|
||||||||||||||||||||||||
 |
|
|
||||||||||||||||||||||
|
||||||||||||||||||||||||
| A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | R | S | T | U | V | X | Z | ||
|
||||||||||||||||||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||||||||||||||||||||
| Roentgenium | Roentgenium | Rendgenij | Roentgenio | Roentgenium | ||||||||||||||||||||
|
||||||||||||||||||||||||
|
Rg Roentgenium |
|
||||||||||||||||||||||||||||||
- Roentgenium was discovered by S. Hofmann et al. collaboration at the
Heavy Ion Research Laboratory (Gesellschaft für Schwerionenforschung,
GSI) in Darmstadt, Germany in December 1994. Named in honour of Wilhelm
Conrad Roentgen. It is synthetic radioactive metal.
|
|
|
|
TRANSITION ELEMENT: COPPER GROUP | |
|
||
| Relative atomic mass: | [272] | Electronic configuration: | [Rn] 5f14 6d10 7s1 |
| Formal oxidation number: | Electronegativities: | - | |
| Thermal conductivity: | - W m-1 K-1 | Electrical resistivity (20 °C): | - μΩcm |
| Atomic radius: | - pm | Standard state (20 °C): | solid |
| Density (g dm-3): | - | Molar volume (cm3 mol-1): | - |
|
|
|
|
THERMAL PROPERTIES | |
|
||
| Melting point: | - °C | Heat of fusion: | - kJ mol-1 |
| Boiling point: | - °C | Heat of vaporization: | - kJ mol-1 |
| Critical temperature: | - °C | Heat of atomization: | - kJ mol-1 |
|
|
|
|
IONIZATION ENERGIES AND ABUNDANCE | |
|
||
| 1st ionization energy: | - kJ mol-1 | Abundance of element (air): | - ppm |
| 2nd ionization energy: | - kJ mol-1 | Abundance of element (Earth's crust): | - ppm |
| 3rd ionization energy: | - kJ mol-1 | Abundance of element (oceans): | - ppm |
|
|
|
|
ISOTOPES | |
|
||
|
Isotopes | Relative atomic mass | Abundance (%) |
|
|
||
|
|
|
|
MINERALS AND USES | |
|
||
- In bombardments of 209Bi targets with 64Ni using the velocity selector SHIP facility to discriminate in favor of the fused product, 272111 + 1n, three sets of localized alpha-decay chains were observed with position-sensitive detectors.
|
|
|
|
REDUCTION POTENTIALS | |
|
||
|
Balanced half-reaction | Eo / V | Annotation |
|
|
||
