Astatine yog cov khoom siv tshuaj nrog lub cim ntawm tus lej atomic 85. Nws yog qhov tsis tshua muaj tshwm sim nyob rau hauv lub ntiaj teb pob zeb, tshwm sim tsuas yog cov khoom lwj ntawm ntau yam hnyav dua. Tag nrho cov astatinine isotopes yog luv luv; Qhov ruaj khov tshaj plaws yog astatin-210, nrog ib nrab-lub neej ntawm 8.1 teev.
Astatine nrhiav tau li cas?
Mackenzie thiab Emilio Segre ntawm University of California tau pom cov pov thawj rau qhov muaj nyob ntawm qhov tsis paub ntawm kawg ntawm lub sijhawm thaum foob pob bismuth isotope nrog alpha hais siv cyclotron. Los ntawm cov kev sim no, lawv tau lees paub tias muaj qhov sib ntxiv tshiab rau lub sijhawm lub sijhawm - Astatine-211.
Leej twg nrhiav tau astatine 85?
Qhov kev tshawb pom ntawm lub caij 85 tau tsim los ntawm peb tus kws tshawb fawb Berkeley, Dale Corson, Alexander MacKenzie, thiab Emilio Segrè, hauv 1940 (daim duab 8.2).
Astatine siv rau hauv ntiaj teb yog dab tsi?
Me ntsis paub txog Astatine (atomic 85), lossis 'At', vim tias nws yog ib qho tsis tshua muaj hluav taws xob uas tawg sai heev. Cov kws tshawb fawb yuav tsum xav txog cov ntaub ntawv hais txog astatine los ntawm cov ntsiab lus halogen zoo li iodine. Astatine tuaj yeem siv tau hauv kev kho mob qog nqaij hlav qog noj ntshav thiab ua tus kab mob radioactive.
Dab tsi yog cov khoom siv tsawg tshaj plaws hauv ntiaj teb?
Astatine yog ib qho tshuaj lom neeg nrog lub cim Ntawm thiab tus lej atomic 85. Nws yog qhov tsis tshua muaj tshwm sim hauv ntiaj teb.crust, tshwm sim tsuas yog cov khoom lwj ntawm ntau yam hnyav dua. Tag nrho cov astatinine isotopes yog luv luv; Qhov ruaj khov tshaj plaws yog astatin-210, nrog ib nrab-lub neej ntawm 8.1 teev.
