Polonium hydrogen
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| General | |||||||||||||
| Surname | Polonium hydrogen | ||||||||||||
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| Molecular formula | H 2 Po | ||||||||||||
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| properties | |||||||||||||
| Molar mass | 211.98 g mol −1 | ||||||||||||
| Physical state |
liquid |
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| Melting point |
−35.3 ° C |
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| boiling point |
36.1 ° C |
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| Hazard and safety information | |||||||||||||
 Radioactive |
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| As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . | |||||||||||||
Polonium hydrogen , H 2 Po, is a compound of polonium and hydrogen that is liquid at room temperature . Polonium hydrogen is chemically very unstable and, like all polonium compounds, highly radioactive .
Extraction and presentation
Polonium hydrogen cannot be extracted from the elements like hydrogen sulphide . Instead, elemental polonium is reduced with magnesium in the presence of dilute hydrochloric acid . However, only traces of polonium hydrogen are produced.
properties
Like the lighter analogous compounds selenium hydrogen and tellurium hydrogen, polonium hydrogen is an endothermic compound and decomposes into the elements while releasing heat. The amount of heat given off is> 100 kJ / mol, the largest of all chalcogen- hydrogen compounds.
Like the other chalcogen-hydrogen compounds, polonium hydrogen can form two series of salts , the polonides and hydrogen polonides . However, no examples are known of the hydrogen polonides. An example of a polonide is lead polonide , which is always found in polonium samples , since lead is formed during α-decay of polonium .
Individual evidence
- ^ A b A. F. Holleman , E. Wiberg , N. Wiberg : Textbook of Inorganic Chemistry . 102nd edition. Walter de Gruyter, Berlin 2007, ISBN 978-3-11-017770-1 , p. 627.
- ↑ The hazards emanating from radioactivity do not belong to the properties to be classified according to the GHS labeling. With regard to other hazards, this substance has either not yet been classified or a reliable and citable source has not yet been found.
- ^ F. Weigel: Chemistry of Polonium . In: Angew. Chem. 1959 , 71 , 289-316, doi : 10.1002 / anie.19590710902 .
literature
- AF Holleman , E. Wiberg , N. Wiberg : Textbook of Inorganic Chemistry . 102nd edition. Walter de Gruyter, Berlin 2007, ISBN 978-3-11-017770-1 , pp. 626-627.