2016 Beijing Question 1 Single-choice Differentiating 2016_北京 Paper 1.(6分)处于$n=3$能级的大量氢原子,向低能级跃迁时,辐射光的频率有( ) A. 1 种B. 2 种C. 3 种D. 4 种 Answer keyC ☆ SaveCan't do it, show the explanation查看原卷 →