摘要:A.Ra衰变为Rn.要经过1次衰变和1次衰变
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下列说法正确的是( )
A.
Ra衰变为
Rn要经过1次α衰变和1次β衰变
B.
U衰变为
Pa要经过1次α衰变和1次β衰变
C.
Th衰变为
Pb要经过6次α衰变和4次β衰变
D.
U衰变为
Rn要经过4次α衰变和4次β衰变
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A.
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B.
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C.
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D.
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下列说法正确的是( )
A.
Ra衰变为
Rn要经过1次α衰变和1次β衰变
B.
U衰变为
Pa要经过1次α衰变和1次β衰变
C.
Th衰变为
Pb要经过6次α衰变和4次β衰变
D.
U衰变为
Rn要经过4次α衰变和4次β衰变
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A.
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B.
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C.
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D.
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下列说法正确的是
A.Ra衰变为
Rn要经过1次α衰变和1次β衰变
B.U衰变为
Pa要经过1次α衰变和1次β衰变
C.Th衰变为
Pb要经过6次α衰变和4次β衰变
D.U衰变为
Rn要经过4次α衰变和4次β衰变