Astatine
| Latin name | Astatium |
| English name | Astatine |
| chemical symbol | At |
| atomic number | 85 |
| relative atomic mass | (209,9871) |
| period | 6 |
| group | VII.A |
| classification | halogens |
| discovery year | 1940 |
| discoverer | Corson, MacKenzie, Segre |
| melting point [°C] | 302 |
| boiling point [°C] | 337 |
| density [g cm-3] | N/A |
| electronegativity [Pauling] | 2,2 |
| oxidation states | -I, I, III, V, VII |
| electron configuration | [Xe]4f14 5d10 6s2 6p5 |
| atomic radius [pm] | 127 |
| heat of fusion [kJ mol-1] | 6 |
| thermal conductivity [W m-1 K-1] | 1,7 |
| 1. ionizing potential [eV] | 9,5 |
| state at normal conditions | solid |
Resources
- Astatine. In: American Elements [online]. 2009 [cit. 2012-12-15]. Available from: http://www.americanelements.com/
- Astatine. In: Elements Database [online]. 2012 [cit. 2012-12-19]. Available from: http://www.elementsdatabase.com/
- STWERTKA, Albert. A Guide to the Elements. Oxford: University Press, 2002. ISBN 0-19-515027-9.
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