本题目来源于试卷: Quantum Mechanics of Atoms，类别为 IB物理学
[问答题]
The ionization energy /.d83sfewm7v cfyyl 8for neo/bazd,mr qm7e yf+i8 :n $(Z=10)$ is 21.6 eV, and that for sodium $(Z=11)$ is 5.1 eV. Explain the large difference.
参考答案:
Neon is a “closed shell” atom (a noble gas) where all of the electron shells are completely full and spherically symmetric, and so its electrons are not readily ionized. Sodium is a Group I atom (an alkali metal) that has one lone electron in the outermost shell, and this electron spends a considerable amount of time far away from the nucleus and also shielded from the nucleus. The result is that sodium can be ionized much easier than neon, which the two ionization energies demonstrate very well.
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