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.
pom astatine nyob qhov twg?
Astatine tsuas pom tau ntawm lub ntiaj teb tom qab kev lwj ntawm thorium thiab uranium. Nws kwv yees tias tsawg dua 30 g ntawm astatine muaj nyob hauv lub ntiaj teb, tsuas yog ob peb µg ntawm astatine tau tsim tawm los txog tam sim no, thiab lub ntsiab lus astatine tseem tsis tau pom los ntawm qhov muag liab qab vim nws tsis ruaj khov.
Puas muaj leej twg pom astatine?
Txij li thaum nws tau pom thawj zaug hauv xyoo 1940, astatine tau xav tias yog qhov tsawg tshaj plaws ntawm txhua yam tshwm sim hauv ntiaj teb. … Zoo, yog vim tsis muaj leej twg tau pom astatine.
Ntau npaum li cas astatine tau pom?
Astatine yog lub ntsiab lus tsawg tshaj plaws hauv ntiaj teb; tsuas yog kwv yees li 25 grams tshwm sim ib txwm nyob hauv ntiaj teb txhua lub sijhawm. Nws lub neej tau kwv yees nyob rau xyoo 1800, tab sis thaum kawg tau tshawb pom txog 70 xyoo tom qab.
Astatine nrhiav tau li cas?
Astatine, uas tsis muaj isotopes ruaj khov, yog thawj zaug tsim tawm (1940) hauv University of California los ntawm American physicists Dale R . … Corson, Kenneth R. MacKenzie, thiab Emilio Segrè, uas tau foob pob bismuthNrog ceev alpha hais (helium nuclei) kom tawm los astatine-211 thiab neutrons.
