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Einsteinium
einsteinium atom
Identifikatoren & physikalische Daten
| CAS No. | 7429-92-7 |
|---|---|
| Summenformel | Es |
| Durchschnittliche Molmasse | 252,083 g/mol |
| Monoisotopische Masse | 252,083 g/mol |
| SMILES | [Es] |
| InChIKey | CKBRQZNRCSJHFT-UHFFFAOYSA-N |
| PubChem CID | 23913 |
| ChEBI | CHEBI:33393 |
| DTXSID | DTXSID30225305 |
Chemische & physikalische Eigenschaften
| Polarare Oberfläche (TPSA) | 0 |
|---|---|
| H-Brücken-Donoren | 0 |
| H-Brücken-Akzeptoren | 0 |
| Frei drehbare Bindungen | 0 |
| Schwere Atome | 1 |
| Formalladung | 0 |
| Komplexität | 0 |
| Stoffklassen | Physical/Radiation -> Radionuclides |
| SpringerMaterials Properties | nuclear state |
| Physical Description | A metal with a melting point of about 860 degrees C[Merck Index] |
| Schmelzpunkt | 860 ±50° |
| Dichte | 8.84 |
| Aggregatzustand | metal |
| Farbe | metalcubic |
| Bulk Modulus | 15.0 GPa, Estimated |
| CAS Datenbank | 7429-92-7 |
Sicherheit & Vorschriften
| Gefahrenübersicht | Most Important Radionuclide: Es-254 Source: Neutron bombardment of plutoniumHalf-Life: 472 days Lung Clearance Half-Time: Weeks Internal Toxicity: Very High Annual Limit on Intake: 0.00002 mCi[See Glossary for references.] See Radiation, ionizing. |
|---|
Anwendungen & Verwendung
History
The name of Es derives from “Albert Einstein”, the Geituan born physicist who proposed the theory of relativity. A collaboration of American scientists G. R. Choppin, S. G. Thompson, A. Ghiorso, and B. G. Harvey, from the Argonne National Laboratory near Chicago, Illinois, the Los Alamos Scientific Laboratory in Los Alamos, New Mexico and at the University of California lab in Berkeley, CA, first found 252Es in the radioactive debris from the first large thermonuclear bomb explosion, nicknamed “Mike,” which took place at Enewetak atoll, Marshall Islands in the Pacific on November 1, 1952. The longest halflife associated with this unstable element is 472 day 252Es.