Copyright © Philip M. Parker, INSEAD. Terms of Use.
Definition: Astatine |
AstatineNoun1. A highly unstable radioactive element (the heaviest of the halogen series); a decay product of uranium and thorium. Source: WordNet 1.7.1 Copyright © 2001 by Princeton University. All rights reserved. |
| Domain | Definition |
Chemistry | A radioactive element belonging to the halogens, discovered by bombarding bismuth with helium nuclei and also formed by radioactive decay. Source: European Union. (references) |
Chemistry | Chemical element:atomic number 85. Source: European Union. (references) |
Health | Astatine. A radioactive halogen with the atomic symbol At, atomic number 85, and atomic weight 210. Its isotopes range in mass number from 200 to 219 and all have an extremely short half-life. Astatine may be of use in the treatment of hyperthyroidism. (references) |
Source: compiled by the editor from various references; see credits. | |
(From Wikipedia, the free Encyclopedia)
| General | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Name, Symbol, Number | Astatine, At, 85 | ||||||||||||
| Series | Halogens | ||||||||||||
| Group, Period, Block | 17 (VIIA), 6 , p | ||||||||||||
| Density, Hardness | no data, no data | ||||||||||||
| Appearance | metallic | ||||||||||||
| Atomic Properties | |||||||||||||
| Atomic weight | [210] amu | ||||||||||||
| Atomic radius | no data | ||||||||||||
| Covalent radius | 127 pm | ||||||||||||
| van der Waals radius | no data | ||||||||||||
| Electron configuration | [Xe]44f14 5d10 6s2 6p5 | ||||||||||||
| e- 's per energy level | 2, 8, 18, 32, 18, 7 | ||||||||||||
| Oxidation states (Oxide) | ±1,3,5,7 (unknown) | ||||||||||||
| Crystal structure | no data | ||||||||||||
| Physical Properties | |||||||||||||
| State of matter | solid | ||||||||||||
| Melting point | 575 K (576 °F) | ||||||||||||
| Boiling point | no data | ||||||||||||
| Molar volume | no data | ||||||||||||
| Heat of vaporization | no data | ||||||||||||
| Heat of fusion | 114 kJ/mol | ||||||||||||
| Vapor pressure | no data | ||||||||||||
| Speed of sound | no data | ||||||||||||
| Miscellaneous | |||||||||||||
| Electronegativity | 2.2 (Pauling scale) | ||||||||||||
| Specific heat capacity | no data | ||||||||||||
| Electrical conductivity | no data | ||||||||||||
| Thermal conductivity | 1.7 W/(m*K) | ||||||||||||
| 1st ionization potential | 20 kJ/mol | ||||||||||||
| Most Stable Isotopes | |||||||||||||
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| SI units & STP are used except where noted. | |||||||||||||
The total amount of astatine in the earth's crust is estimated to be less than 1 oz (28 g) at any one time.
Notable Characteristics
This highly radioactive element has been confirmed by mass spectrometers to behave chemically much like other halogens, especially iodine (it probably accumulates in the thyroid gland like iodine). Astatine is thought to be more metallic than iodine. Researchers at the Brookhaven National Laboratory have performed experiments that have identified and measured elementary reactions that involve astatine.History
Astatine (Greek astatos meaning "unstable") was first synthesized in 1940 by Dale Corson, K.R. MacKenzie, and Emilio Segre of the University of California by barraging bismuth with alpha particles.
Occurrence
Astatine is produced by bombarding bismuth with energetic alpha particles to obtain relatively long-lived At-209 - At-211, which can then be distilled from the target by heating in the presence of air.
Isotopes
Astatine has about 20 known isotopes, all of which are radioactive; the longest-lived isotope is 210At which has a half-life of only 8.3 hours. Astatine is a halogen and possibly accumulates in the thyroid like iodine.
Source: adapted by the editor from Wikipedia, the free encyclopedia under a copyleft GNU Free Documentation License (GFDL) from the article "Astatine."
Synonym: AstatineSynonym: atomic number 85 (n). (additional references) |
Crosswords: Astatine |
| English words defined with "astatine": halogen. (references) |
| Domain | Title |
Books | |
Source: compiled by the editor from various references; see credits. | |
| The following statistics estimate the number of searches per day across the major English-language search engines as identified by various trade publications. Hyperlinks lead to commercial use of the expression at Amazon.com. |
| Expression | Frequency per Day |
astatine | 16 |
astatine use | 8 |
astatine common use | 2 |
| Source: compiled by the editor from various references; see credits. | |
| Language | Translations for "astatine"; alternative meanings/domain in parentheses. | ||||||||||||||||||||||||||||
Danish | astatin, astat. (various references) | ||||||||||||||||||||||||||||
Dutch | astatium, astaat. (various references) | ||||||||||||||||||||||||||||
Esperanto | astateno. (various references) | ||||||||||||||||||||||||||||
French | astate. (various references) | ||||||||||||||||||||||||||||
German | Astatin, Astat. (various references) | ||||||||||||||||||||||||||||
Greek | αστάτιο. (various references) | ||||||||||||||||||||||||||||
Italian | astato. (various references) | ||||||||||||||||||||||||||||
Japanese Kanji | アジ"説 (ASCII, Ascot tie, asphalt concrete, asterisk, inflammatory speech, propaganda speech). (various references) | ||||||||||||||||||||||||||||
Japanese Katakana | アスタチン . (various references) | ||||||||||||||||||||||||||||
Pig Latin | astatineay astato. (various references) астатин. (various references) astato. (various references) astat. (various references) | ||||||||||||||||||||||||||||
Derivations | |
Words beginning with "astatine": astatines. (additional references) | |
| |
"Astatine" is suggested in spellcheckers for the following: Achatine, Asatiani, bassatine, Batastini, Maitatsine, Sabatino, saltative. (additional references) | |
| Source: compiled by the editor, based on several corpora (additional references). | |
Scrabble® Enable2K-Verified Anagrams | |
Direct Anagrams: sanitate. | |
| Words within the letters "a-a-e-i-n-s-t-t" | |
-1 letter: attains, entasia, instate, satiate, satinet, taenias. | |
-2 letters: ansate, attain, sitten, taenia, taints, tanist, tenias, tineas, tisane, titans. | |
-3 letters: anise, ansae, antae, antas, antes, antis, entia, etnas, inset, nates, neats, neist, netts, nites, saint, satin, senti, stain, stane, state, stein, stint, tains, taint, taste, tates, teats, tenia, tents, testa, tinea, tines, tints, titan. | |
-4 letters: ains. | |
| Words containing the letters "a-a-e-i-n-s-t-t" | |
+1 letter: antistate, astatines, attainers, insatiate, patinates, reattains, sanitated, sanitates, staminate, tantalise, tearstain, titanates. | |
+2 letters: antiquates, antitrades, attainders, infatuates, intrastate, natalities, tantalised, tantalises, tantalites, tantalizes, tanzanites, tearstains. | |
+3 letters: admittances, adventitias, aestivating, aestivation, alterations, anaesthetic, anthracites, anticipates, antimatters, antinatures, antipathies, antirealist, aquatinters, assentation, atonalities, attainments, attestation, cantatrices, cantillates, catenations, devastating, devastation, exaltations, gestational, inactivates, ingratiates, insatiately, instantiate, italianates, manifestant, palatinates, paternalist, quantitates, stalemating, tantalizers, tearstained, tetracaines, trabeations, translative, vaticinates. | |
| Source: compiled by the editor from various references; see credits. SCRABBLE® is a registered trademark. All intellectual property rights in and to the game are owned in the U.S.A and Canada by Hasbro Inc., and throughout the rest of the world by J.W. Spear & Sons Limited of Maidenhead, Berkshire, England, a subsidiary of Mattel Inc. Mattel and Spear are not affiliated with Hasbro. | |
| 1. Definition 2. Synonyms 3. Crosswords 4. Usage: Commercial | 5. Expressions: Internet 6. Translations: Modern 7. Derivations 8. Anagrams | 9. Bibliography |
Copyright © Philip M. Parker, INSEAD. Terms of Use.
