astatine

(redirected from Astat)
Also found in: Thesaurus, Medical, Acronyms, Encyclopedia.
Related to Astat: astatine

as·ta·tine

 (ăs′tə-tēn′, -tĭn)
n. Symbol At
A highly unstable radioactive element, the heaviest of the halogen group, 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 Periodic Table.

[Greek astatos, unstable; see astasia + -ine.]

astatine

(ˈæstəˌtiːn; -tɪn)
n
(Elements & Compounds) a radioactive element of the halogen series: a decay product of uranium and thorium that occurs naturally in minute amounts and is artificially produced by bombarding bismuth with alpha particles. Symbol: At; atomic no: 85; half-life of most stable isotope, 210At: 8.1 hours; probable valency: 1,3,5, or 7; melting pt: 302°C; boiling pt: 337°C (est)
[C20: from Greek astatos unstable (see astatic) + -ine2]

as•ta•tine

(ˈæs təˌtin -tɪn)

n.
a rare element of the halogen family. Symbol: At; at. no.: 85.
[1945–50; < Greek ástat(os) unstable + -ine2]

as·ta·tine

(ăs′tə-tēn′)
Symbol At A highly unstable, radioactive element that is the heaviest of the halogen elements. The most stable of its many isotopes has a half-life of only about eight hours. Atomic number 85. See Periodic Table.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.astatine - a highly unstable radioactive element (the heaviest of the halogen series)astatine - a highly unstable radioactive element (the heaviest of the halogen series); a decay product of uranium and thorium
chemical element, element - any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter
halogen - any of five related nonmetallic elements (fluorine or chlorine or bromine or iodine or astatine) that are all monovalent and readily form negative ions
Translations
astat
astat
astaat
astatiini
astate
astat
asztácium
astat
アスタチン
astatium
astatinas
astat
astat
astato
astatin
astat
astat
astat
астат
astatin
References in periodicals archive ?
The instructor will cover both NEMA and IEC products, including, but not limited to, pushbuttons, starters and ASTAT solid-state starters with time spent on drives.
The commentary is somewhat sparse, although Michot has identified nearly all of the classical references made by Avicenna; I note in passing that the translator of Aristotle's Metaphysics is commonly known as Ustat or Ustath, and not Astat.
A stage direction in The Last Supper: The Conspiracy with Judas of the N-Town Plays states: Here Cryst enteryth into pe hous with his disciplis andete pe paschal lomb; and in pe menetyme pe cownsel hous befornseyd xal sodeynly onclose schewyngpe buschopys, prestys and jewgys syttyng in here astat lych as it were a convocacyon; Annas seyngpus:' (15) Another stage direction in the same play refers to use of the same device: Here the buschopys partyn in pe place, and eche of hem takyn here leve be contenawns, resortyng eche man to his place with here meny, to make redy to take Cryst.