astatine
Kelime Anlamı :

1. astatin.
2. astatin (At).
3. At semboli ile bilinen, atom no: 85 ve atom ağırlığı 211 kimyasal element, astatin.
Tanımlar :
1. A highly unstable radioactive element, the heaviest of the halogen series, that resembles iodine in solution. its longest lived isotope has a mass number of 210 and has a half-life of 8.3 hours. atomic number 85; melting point 302°C; boiling point 337°C; valence probably 1, 3, 5, 7. see table at element.
from The American Heritage® Dictionary of the English Language, 4th Edition
1. A highly radioactive chemical element (symbol at), one of the halogens, with atomic number 85.
from Wiktionary, Creative Commons Attribution/Share-Alike License
1. a highly unstable radioactive element (the heaviest of the halogen series); a decay product of uranium and thorium
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.