题目内容
下列说法正确的是( )
A.原子核发生衰变时要遵守电荷守恒和质量守恒的规律 |
B.![]() ![]() ![]() |
C.氢原子从激发态向基态跃迁只能辐射特定频率的光子 |
D.发生光电效应时光电子的动能只与入射光的强度有关 |
C
试题分析:大量事实表明,原子核发生衰变时电荷数和质量数都守恒,但是质量会有亏损;物理学家经过多方面的研究后确认:
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000941535310.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000941535310.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000941567339.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000941582304.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000941676414.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000941691388.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000941707457.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000941723384.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000941754313.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000941769667.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000941785756.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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