Meitnerium (Environmental & Earth Science)
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| Physical Properties | ||
|---|---|---|
| Color | --- | |
| Phase at Room Temp. | --- | |
| Density (g/cm3) | --- | |
| Hardness (Mohs) | --- | |
|
Melting Point (K) |
--- | |
|
Boiling Point (K) |
--- | |
| Heat of Fusion (kJ/mol) | --- | |
| Heat of Vaporization (kJ/mol) | --- | |
| Heat of Atomization (kJ/mol) | --- | |
| Thermal Conductivity (J/m sec K) | --- | |
| Electrical Conductivity (1/mohm cm) | --- | |
| Source | Synthetic | |
| Atomic Properties | ||
| Electron Configuration | [Rn]7s25f146d7 | |
|
Number of Isotopes |
5 (0 natural) | |
| Electron Affinity (kJ/mol) | --- | |
| First Ionization Energy (kJ/mol) | --- | |
| Second Ionization Energy (kJ/mol) | --- | |
| Third Ionization Energy (kJ/mol) | ---- | |
| Electronegativity | --- | |
| Polarizability (Å3) | --- | |
| Atomic Weight | 266 | |
| Atomic Volume (cm3/mol) | --- | |
| Ionic Radius2- (pm) | --- | |
| Ionic Radius1- (pm) | --- | |
| Atomic Radius (pm) | --- | |
| Ionic Radius1+ (pm) | --- | |
| Ionic Radius2+ (pm) | --- | |
| Ionic Radius3+ (pm) | --- | |
| Common Oxidation Numbers | +3 | |
| Other Oxid. Numbers | --- | |
| Abundance | ||
| In Earth's Crust (mg/kg) | --- | |
| In Earth's Ocean (mg/L) | --- | |
| In Human Body (%) | 0% | |
| Regulatory / Health | ||
| CAS Number | 54038-01-6 | |
| OSHA Permissible Exposure Limit (PEL) | No limits | |
| OSHA PEL Vacated 1989 | No limits | |
|
NIOSH Recommended Exposure Limit (REL) |
No limits | |
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Sources: |
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Meitnerium was created and identified by two physicists in Darmstadt, Germany on August 29, 1982 at the Heavy Ion Research Laboratory.
The element Meitnerium was named after Lise Meitner, an Austrian physicist. Its atomic symbol is Mt, Its atomic number is 109 and its atomic mass is 266.14. Meitnerium is classifed as a transition metal, one of four commonly used categories of the Periodic Table (the remaining groups are: main group elements, lanthanides, and actinides).
Meitnerium is a synthetic radioactive element produced through a cold fusion reaction process, also known as low energy nuclear reaction, that involves bombarding Bismuth 209 (209Bi) with a nuclei of Iron 58 (58Fe):
209Bi + 58Fe → 266Mt
Only 10 atoms of Meitnerium have been created and it will probably never be isolated in observable quantities.
Meitnerium has no known industrial uses, nor is it known to perform any specific biological role.
Properties
The physical properties—color, structure, density and hardness— of Meitnerium remain unknown or poorly understood. But it is presumed to be a metallic grey, silvery-white element.
Meitnerium has seven energy levels:
- First Energy Level: 2
- Second Energy Level: 8
- Third Energy Level: 18
- Fourth Energy Level: 32
- Fifth Energy Level: 32
- Sixth Energy Level: 15
- Seventh Energy Level: 2
Electron configuration:
[Rn]7s25f146d7
Meitnerium has an extremely short half life of approximately 3.4 milliseconds (3.4x10-3secs).
First synthesis
Meitnerium was first synthesized for the first time on August 29, 1982 by a German researchers Peter Armbruster and Gottfried Münzenberg at the Institute for Heavy Ion Research (Gesellschaft für Schwerionenforschung) in Darmstadt, Germany. The scientists bombarded a target of bismuth-209 with accelerated nuclei of iron-58 and detected a single atom of the isotope meitnerium-266
Further reading
- United States Department of Energy, Los Alamos National Labs Chemistry Division. 2003. The Periodic Table.
- Royal Society of Chemistry. Visual Elements. Meitnerium.
- Meitnerium @ Periodic Table WebQC Chemical Portal.
