Look up: astatine

1. astatine
   [n] - a highly unstable radioactive element (the heaviest of the halogen series)
   Found on http://www.webdictionary.co.uk/definitio
   
   
2. Astatine
   The heaviest halogen and radioactive. Symbol At Also known as Alabamine
   Found on http://www.diracdelta.co.uk/science/sour
   
   
3. astatine
   a radioactive element belonging to the halogens,discovered by bombarding bismuth with helium nuclei and also formed by radioactive decay Category: Chemistry • chemical element:atomic number 85 Category: Chemistry
   Found on http://www.mijnwoordenboek.nl/definition
   
   
4. astatine
   <chemical> 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. ... Chemical name: Astatine ... (12 Dec 1998) ...
   Found on http://www.mondofacto.com/facts/dictiona
   
   
5. astatine
   At noun a highly unstable radioactive element (the heaviest of the halogen series); a decay product of uranium and thorium
   Found on http://wordnetweb.princeton.edu/perl/web
   
   
6. astatine
   (At) (as´tә-tēn) a chemical element, atomic number 85, atomic weight 210.
   Found on http://www.encyclo.co.uk/local/21001
   
   
7. astatine
   radioactive chemical element and the heaviest member of the halogen elements, or Group 17 (Group VIIa) of the periodic table. Astatine, which has no ... [2 related articles]
   Found on http://www.britannica.com/eb/a-z/a/115
   
   
8. astatine
   astatine (ăs'tutēn,–tin) [Gr.,=unstable], semimetallic radioactive chemical element; symbol At; at. no. 85; at. wt. of most stable isotope 210; m.p. 302°C (estimated); b.p. 337°C (estimated); density unknown; valence believed to be +1, +3, +5, or +7. Astatine is the hea...
   Found on http://www.infoplease.com/ce6/sci/A08051
   
   
9. Astatine
   Astatine is a radioactive halogen element which was discovered by bombarding bismuth with alpha particles and is also released by radioactive decay. It has the symbol At.
   Found on http://www.probertencyclopaedia.com/brow
   
   
10. astatine
    (At) Type: Term Pronunciation: as′tă-tēn Definitions: 1. An artificial radioactive element of the halogen series; atomic no. 85, atomic wt. 211.
    Found on http://www.medilexicon.com/medicaldictio
    
    
11. astatine
    Non-metallic, radioactive element, atomic number 85, relative atomic mass 210. It is a member of the halogen group, and is found at the bottom of Group 7 of the periodic table of the elements. It is very rare in nature. Astatine is highly unstable, with at least 19 isotopes; the longest lived has a half-life of about eight hours
    Found on http://www.talktalk.co.uk/reference/ency