Yahoo奇摩 網頁搜尋

  1. Estrogen-like Effects = 雌激素效能的天然化合物 雌激素具有多方面的生理功能 ,如預防動脈粥樣硬化...

    分類:科學及數學 > 化學 2008年11月14日

  2. In fact, inert pair effect is a sort of phenomenon that "outermost ... in hybridization and bond formation. However, in a Pb atom, the screening effect of the 5d electrons is so poor that the...

    分類:科學及數學 > 化學 2007年03月27日

  3. i just want to ask u how many atoms are there involve in mesomeric effect ? and how many atoms are there involved in induxtive effect ?

    分類:科學及數學 > 化學 2008年09月12日

  4. The inductive effect in chemistry is an experimentally observable effect of the transmission of charge through a... by a substituent is a combination of this inductive effect and the mesomeric effect . The electron cloud in a σ-bond between two unlike atoms is not uniform and is slightly...

    分類:科學及數學 > 化學 2007年08月01日

  5. ... of large n. Also, inner electrons give screening effect in order of: s > p > d. Therefore, the 10 3d-electrons have...

    分類:科學及數學 > 化學 2008年11月06日

  6. Greenhouse effect is caused by gases in Earth's atmosphere absorbing and...comparison: http://en.wikipedia.org/wiki/Greenhouse_ effect In this article, water vapor ranks the top as it...

    分類:科學及數學 > 化學 2009年03月21日

  7. ...significant. Therefore the increase in attractive force outweights the increase in screening effect . As a result the metalic bond is strengthen and so magnesium has a...

    分類:科學及數學 > 化學 2007年02月09日

  8. 1. 2條的C-CH3 bond 有inductive effect . But note that they do not cancel each other, the central carbon is still...

    分類:科學及數學 > 化學 2011年08月31日

  9. (CH3)3CCH2Cl , steric effect is a factor, another reason is that the CH3 group is a electron...

    分類:科學及數學 > 化學 2008年11月20日

  10. ... screening effect (2) Secondary screening effect Electrons in inner shell tend to lie between nucleus and outermost shell. Hence, they shield the...

    分類:科學及數學 > 化學 2010年01月05日