![2.3.5 Excitation and Ionization of Gas Atoms](https://imgs.zsbeike.com/imgs/O/O07095/O07095.0041.1[31118114b065].png)
 Under the effect of external factors,the electrons of an atom may transit to a higherenergy state,which is called excitation. Ionization is the phenomenon of releasingfree electrons from a neutral atom or molecule,which is the result of having certainener (共 6070 字) [閱讀本文] >>