A.4n
B.4n+1
C.4n+2
D.4n+3
[单选题]1164.238U系,又称()系。A.4nB.4n+1C.4n+2D.4n+3
[单选题]U系,又称4n+2系,238U经过()衰变形成稳定核素206Pb。A.8次α和3次βB.8次α和6次βC.9次α和2次βD.9次α和5次β
[单选题]Th系,又称()系。A.4nB.4n+1C.4n+2D.4n+3
[单选题]U系,又称4n+2系,238U经过9次α衰变,7次β衰变形成稳定核素()。A.206PbB.207PbC.208PbD.209Pb
[单选题]锕一铀系又称()系。A.4nB.4n+1C.4n+2D.4n+3