[問題]請問無機

[Quinct (ready steady go!)]

我在做Miessler的無機練習題

第八章的問練習題14題

   Explain the increasing stability of the 2+ oxidation state for Group 14
elements with increasing atomic number.

請問是為什麼呢?

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作者: Quinct (ready steady go!) 看板: Chemistry
標題: Re: [問題]請問無機
時間: Fri Nov 24 12:38:11 2006

:    Explain the increasing stability of the 2+ oxidation state for Group 14
: elements with increasing atomic number.



koria版友寄了個解釋給我

我貼上來和版友們分享一下


      The increased stability of 2+ oxidation states as compared to 4+ is an
example of the "inert pair" effect. In general, the ionization energy
decreases going down a column of the periodic table, because of greater
shielding by the inner electrons.In this family, removal of the second
electron is fairly easy, as it is the first in the higher energy p orbitals.
However, the next two electrons to be removed are the s electrons, and they
are not as thoroughly shielded in the ions. The effect is larger for the
three lower members of the group because the d10 electrons are added
between the s and p electrons. The lower electronegativity of C and Si
make them more likely to form covalent bonds than ions.


  希望他的答案對和我一樣疑惑的人有幫助  :D

  也感謝koria提供詳細解釋  <(_ _)>

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