Astatínì

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(Àtúnjúwe láti Astatine)
Lọ sí: atọ́ka, àwárí
Astatine
85At
I

At

Uus
poloniumastatineradon
Ìhànsójú
black solid (presumed)
Àwọn ìdámọ́ wíwọ́pọ̀
Orúkọ, àmì-ìdámọ́, nọ́mbà astatine, At, 85
Ẹ̀ka ẹ́límẹ̀nti halogens
Ẹgbẹ́, àsìkò, àdìpò 176, p
Ìwúwo átọ́mù (210)
Ìtòléra ẹ̀lẹ́ktrónì [Xe] 4f14 5d10 6s2 6p5
2, 8, 18, 32, 18, 7
Physical properties
Phase solid
Melting point 575 K, 302 °C, 576 °F
Boiling point 610 K, 337 °C, 639 °F
Heat of vaporization 40 kJ·mol−1
Vapor pressure
P (Pa) 1 10 100 1 k 10 k 100 k
at T (K) 361 392 429 475 531 607
Atomic properties
Oxidation states ±1, 3, 5, 7
Electronegativity 2.2 (Pauling scale)
Ionization energies 1st: 890±40 kJ·mol−1
Covalent radius 150 pm
Van der Waals radius 202 pm
Miscellanea
Magnetic ordering no data
Thermal conductivity 1.7 W·m−1·K−1
CAS registry number 7440-68-8
Àwọn ísótòpù dídúró jùlọ
Main article: Àwọn ísótòpù astatine
iso NA half-life DM DE (MeV) DP
210At syn 8.1 h ε, β+ 3.981 210Po
α 5.631 206Bi
211At syn 7.2 h
· r

Astatínì tabi Astatine je apilese kemika alagbararadio pelu ami-idamo At ati nomba atomu 85. Ohun eyi towuwojulo keji ninu awon halojin. Botilejepe astatini nje mimuwaye nitori ijera alagbararadio ninu adanida, nitori short aabo emi kukuru re a le ri ni iye tintin. Astatini koko je mimuwaye latowo Dale R. Corson, Kenneth Ross MacKenzie, ati Emilio Segrè ni 1940. Odun meta koja ki o to dipe ipase astatini bakanna je wiwari ninu awon alumoni aladanida. Titi di aipe opolopo awon iwuwa aladanida ati kemika astatini je nipa sise afiwe mo awon apilese miran. Melo ninu awon isotopu astatini nje lilo bi olufonsita iwonwo alpha ninu awon imulo sayensi, be sini adanwo awon imulo oniwosan fun astatini 211 ti sele. Lowolowo astatini ni apilese aladanida to sowonjulo pelu idiye bi 30g ni o wa ninu igbele Aye.[1]

Itumosi[àtúnṣe | àtúnṣe àmìọ̀rọ̀]

  1. Close, Frank. Particle Physics: A Very Short Introduction. Oxford University Press: New York, 2004. Page 2.