ఆస్టాటైన్, 00At|
| Pronunciation | (ASS-tə-teen-,_--tin) |
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| Appearance | unknown, but probably metallic |
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| Mass number | [210] |
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| Group | మూస:Infobox element/symbol-to-group/format |
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| Period | period 6 |
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| Block | p-block |
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| Electron configuration | [Xe] 4f14 5d10 6s2 6p5 |
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| Electrons per shell | 2, 8, 18, 32, 18, 7 |
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| Phase at STP | solid |
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| Melting point | 575 K (302 °C, 576 °F) |
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| Boiling point | 610 K (337 °C, 639 °F) |
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| Density (near r.t.) | (At2) 6.2–6.5 (predicted)[1] g/cm3 |
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| Heat of vaporization | (At2) 54.39 kJ/mol |
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Vapor pressure
| P (Pa)
|
1
|
10
|
100
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1 k
|
10 k
|
100 k
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| at T (K)
|
361
|
392
|
429
|
475
|
531
|
607
|
|
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| Oxidation states | −1, +1, +3, +5, +7[2] |
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| Electronegativity | Pauling scale: 2.2 |
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| Covalent radius | 150 pm |
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| Van der Waals radius | 202 pm |
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| Natural occurrence | from decay |
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| Thermal conductivity | 1.7 W/(m⋅K) |
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| CAS Number | 7440-68-8 |
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| Discovery | Dale R. Corson, Kenneth Ross MacKenzie, Emilio Segrè (1940) |
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| Template:infobox ఆస్టాటైన్ isotopes does not exist |
 Category: ఆస్టాటైన్
| references |
References
These references will appear in the article, but this list appears only on this page.
- ↑ Bonchev, Danail; Kamenska, Verginia (1981). "Predicting the properties of the 113–120 transactinide elements". The Journal of Physical Chemistry. ACS Publications. 85 (9): 1177–86. doi:10.1021/j150609a021.
- ↑ Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. p. 28. ISBN 0080379419.
- ↑ Hermann, Andreas; Hoffmann, Roald; Ashcroft, N. W. (2013). "Condensed Astatine: Monatomic and Metallic". Physical Review Letters. 111 (11). doi:10.1103/PhysRevLett.111.116404.
- ↑ Rothe, S.; Andreyev, A. N.; Antalic, S.; Borschevsky, A.; Capponi, L.; Cocolios, T. E.; De Witte, H.; Eliav, E.; et al. (2013). "Measurement of the first ionization potential of astatine by laser ionization spectroscopy". Nature Communications. 4: 1835–. doi:10.1038/ncomms2819. PMC 3674244. PMID 23673620.
