A.206Pb
B.207Pb
C.208Pb
D.209Pb
[单选题]1169.23?系,又称4n+3系,235U经过()次ct衰变和()次p衰变,最后形成稳定核素2Q7Pb。A.74B.97C.96D.95
[单选题]1165.238U系,又称4n+2系,238U经过9次α衰变和7次β衰变,最后形成稳定核素()。A.206PbB.207PbC.208PbD.209P
[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]U系经过9次α衰变和6次β衰变形成稳定核素()。A.206PbB.207PbC.208PbD.209Pb
[单选题]1166.238U系,又称4n+2系,238U经过()次α衰变和()次β衰变,最后形成稳定核素206Pb。A.74B.97C.96D.95
[单选题]Th系,又称4n系,232Th经过7次α衰变和4次β衰变,最后形成稳定核素()。A.206PbB.207PbC.208PbD.209Pb
[单选题]1162.232Th系,又称4n系,232Th经过7次α衰变和4次β衰变,最后形成稳定核素()。.A.206PbB.207PbC.208PbD.209
[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]1163.232Th系,又称4n系,232Th经过()次α衰变和()次β衰变,最后形成稳定核索208pb。A.74B.97C.96D.95
[单选题]锕-铀系是从U235开始的,经过()次连续衰变,到达稳定核素()。A.10、Pb206B.10、Pb207C.11、Pb206D.11、Pb207