题目内容
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824133407315540.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824133407378549.png)
A.n1=6,n2=8,n3=22 | B.n1=6,n2=8,n3=16 |
C.n1=8,n2=6,n3=22 | D.n1=8,n2=6,n3=16 |
C
根据质量数守恒,求得α衰变的次数
,电荷数减小16;发生一次β衰变,一个中子转化成一个质子和一个电子,根据电荷数守恒,β衰变的次数
,发生一次α粒子衰变减小2个质子与2个中子,故共减小的中子数为
,C正确。
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824133407409897.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824133407456889.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824133407487737.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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题目内容
A.n1=6,n2=8,n3=22 | B.n1=6,n2=8,n3=16 |
C.n1=8,n2=6,n3=22 | D.n1=8,n2=6,n3=16 |