QUÉ SIGNIFICA ASTATINE EN INGLÉS
Astatina
Astatine es un elemento químico radiactivo con el símbolo químico At y el número atómico 85. Ocurre en la tierra solamente como resultado de la desintegración radiactiva de ciertos elementos más pesados. Todos sus isótopos son de corta duración; El más estable es el astatine-210, con una vida media de 8,1 horas. Por consiguiente, se sabe mucho menos sobre la astatina que la mayoría de los otros elementos. Las propiedades observadas son consistentes con que sea un análogo más pesado de yodo; Muchas otras propiedades se han estimado sobre la base de esta semejanza. La astatina elemental nunca se ha visto, porque una masa lo suficientemente grande para ser vista (por el ojo humano desnudo) sería inmediatamente vaporizada por el calor generado por su propia radioactividad. Astatina puede ser oscura, o puede tener un aspecto metálico y ser un semiconductor, o incluso puede ser un metal. Es probable que tenga un punto de fusión mucho mayor que el yodo, a la par con los de bismuto y polonio. Químicamente, astatina se comporta más o menos como un halógeno (el grupo que incluye cloro y flúor), se espera que forme astatides iónicos con metales alcalinos o alcalinotérreos; Se sabe que forma compuestos covalentes con no metales, incluyendo otros halógenos.
definición de astatine en el diccionario inglés
La definición de astatine en el diccionario es un elemento radiactivo de la serie de halógeno: un producto de descomposición de uranio y torio que se produce naturalmente en cantidades diminutas y se produce artificialmente bombardeando bismuto con partículas alfa. Símbolo: En; número atómico: 85; vida media del isótopo más estable, 210 A: 8.1 horas; valencia probable: 1,3,5 o 7; punto de fusión: 302 ° C; punto de ebullición: 337 ° C.
10 LIBROS DEL INGLÉS RELACIONADOS CON «ASTATINE»
Descubre el uso de
astatine en la siguiente selección bibliográfica. Libros relacionados con
astatine y pequeños extractos de los mismos para contextualizar su uso en la literatura.
1
The Halogen Elements: Fluorine, Chlorine, Bromine, Iodine, ...
Introduces the Halogen Family and teaches how these elements are connected, found, used, and structured.
2
The Radiochemistry of
Astatine
Evan H. Appelman. scintillator. It is advantageous to reduce the relatively high
background of the scintillator by operating it as an energy analyzer registering
only counts of energy in the vicinity of the ca. 90 kv. k-x-ray of the astatine's
polonium ...
52 £ 5 An autoradiograph reveals concentrations of astatine-211 in tissue from a
human thyroid tumour that has been implanted in a mouse. The "stars" are due to
the tracks of alpha particles emitted by the astatine particle in human tissue is ...
4
Inorganic Reactions and Methods, The Formation of Bonds to ...
Astatine lnterhalogen Compound 2.2.4.3.2. by Oxidizing Fluorinating Agents (
Excluding F2). RfI + XFn —> RfIF2 (a) When using xs halogen fluoride, the
iodotetrafluorides are obtained': RfI + ClF3 (BrF3, BrF5) —> RfIF4 (b) (J. SHAMIR)
1.
J. J. Zuckerman, A. P. Hagen,
2009
5
Fluorine and the Halogens
The. discovery. of. astatine. A gap was left in the periodic table where an element
was thought to exist, but was still undiscovered. Chemists were keen to find the
missing element and fill the gap, but it quickly became clear that they would have
...
6
Chemistry of Chemical Bonding
The separation of astatine from a bismuth target can be accomplished by
dissolving it in perchloric acid with subsequent precipitation of bismuth as the
phosphate. Polonium is coprecipitated with bismuth, the astatine being distilled
out of the ...
7
Advanced Inorganic Chemistry Vol-1
ssAt — — — > S4» o > K2Pn > s^Bi orbital electron capture a :207 -i > 8,Bi"
Separation of Astatine - Astatine is produced by bombardment of bismuth or
thorium with high-energy alpha particles. So, in order to produce astatine it is
necessary to ...
8
Nuclear and Radiation Chemistry
radius of At ion is 2.3A and in gaseous state it is 1.97A. (g) Astatine volatilizes
from glass surfaces even at room temperature. It is separated from polonium by
sublimation. Its volatilization from the surface of Ag, .Au or Pt is slow. Elemental ...
9
Astatine: Isotopes of
Astatine, Kenneth Ross Mackenzie, ...
Purchase includes a free trial membership in the publisher's book club where you can select from more than a million books without charge. Excerpt: Astatine is a radioactive chemical element with the symbol At and atomic number 85.
10
Isotopes of
Astatine:
Astatine-191,
Astatine-192, ...
Source: Wikipedia. Pages: 144. Not illustrated. Free updates online. Purchase includes a free trial membership in the publisher's book club where you can select from more than a million books without charge.
10 NOTICIAS EN LAS QUE SE INCLUYE EL TÉRMINO «ASTATINE»
Conoce de qué se habla en los medios de comunicación nacionales e internacionales y cómo se emplea el término
astatine en el contexto de las siguientes noticias.
Alpha therapy targets metastatic disease
Potential alpha-emitting isotopes include: bismuth-213, with a half-life of 46 minutes; astatine-211, with a half-life of 7.2 hours; radium-223 with ... «Medical Physics Web, Jun 15»
DOE Isotope Program Announces Availability of Radionuclide …
... and radium-223; investing in research on accelerator production of actinium-225; and supporting development of production of astatine-211 ... «Newswise, Jun 15»
Nightclubs: LA Grand Opening, Ignite
Flamboyant Fridays: The Astatine Collective, R&B and soul band, and DJ Shango Da Don, 9 p.m.-midnight, Fleet Reserve Association, 891 ... «Honolulu Pulse, May 15»
NM son on an epic walk talks of time, pace of life
This is a commodity that is as scarce as Astatine in the hurly burly global north: waiting. I've always found its absence – its negative value – in ... «Albuquerque Journal, Abr 15»
Nightclubs: First Friday, OpenHau5, Beat Root
AT85, live hip-hop, R&B, neo-soul, funk and reggae by the Astatine Collective, 10 p.m.-2 a.m., Dragon Upstairs. No cover. Super Handsome ... «Honolulu Pulse, Abr 15»
The lost elements: the periodic table's shadow side
... for the periodic table in the early 20th century, vacancies still existed, such as the elements 43 (technetium), 75 (rhenium) and 85 (astatine). «Royal Society of Chemistry, Mar 15»
Metro rushes to install more 'low-smoke' power cables after L'Enfant …
“This type of cabling has insulation and jacket material free of halogenated materials like fluorine, chlorine, bromine, iodine and astatine ... «Washington Post, Feb 15»
U.S. Shale Boom May Come To Abrupt End
With all due respect Mr. Spetseris, this is the most astatine post I have ever read. I don't even know where to start with you. Your EURs are ... «OilPrice.com, Ene 15»
The matrix (2015)
Halogen-free flame retardants are being developed because halogens (i.e., bromine, which, along with fluorine, chlorine, iodine and astatine, ... «High Performance Composites, Ene 15»
My Great-Great-Aunt Discovered Francium. And It Killed Her.
Only a minuscule fraction of Polonium 215 takes the beta-decay route, to become astatine. The time it takes for half a sample of an element to ... «New York Times, Dic 14»