英文字典中文字典


英文字典中文字典51ZiDian.com



中文字典辞典   英文字典 a   b   c   d   e   f   g   h   i   j   k   l   m   n   o   p   q   r   s   t   u   v   w   x   y   z       







请输入英文单字，中文词皆可：


请选择你想看的字典辞典：
单词字典翻译
Satureja查看　Satureja　在百度字典中的解释百度英翻中〔查看〕
Satureja查看　Satureja　在Google字典中的解释Google英翻中〔查看〕
Satureja查看　Satureja　在Yahoo字典中的解释Yahoo英翻中〔查看〕

安装中文字典英文字典查询工具!


中文字典英文字典工具:
选择颜色:
输入中英文单字

































































英文字典中文字典相关资料:


  • organic chemistry - Bond dissociation energy order for C−C, N−N, O−O . . .
    It is likely that the $\ce {N–N, O–O,}$ and $\ce {F–F}$ single bonds are weaker than might be expected due to strong repulsive interactions between lone pairs of electrons on adjacent atoms
  • Why does N₂ react with O₂ to Form NO at high temperatures?
    The Haber process usually uses metal catalysts to help the bonds break It runs at extremely high temperatures and pressures, enough to cause worry that it will burst steel vessels At these conditions breaking $\ce {N2}$ and $\ce {H2}$ can and does happen It's true that the nitrogen-nitrogen bond is broken, but once that happens ammonia forms quickly
  • What is the difference between O O2 - Chemistry Stack Exchange
    So, to reiterate, the difference between oxygen $\left (\ce O\right)$ and oxygen $\left (\ce {O2}\right)$ is that the former is an oxygen atom while the latter consists of two $\ce O$ atoms bound together, forming a molecule also called oxygen
  • inorganic chemistry - How does O2- have the largest radius - Chemistry . . .
    Why is the correct option O^2-, aren't all of them equal since they all have the same number of energy shells and same number of electrons in them
  • Why doesnt ionization energy decrease from O to F or F to Ne?
    I know that in general, the first ionization energy increases across a period due to increasing nuclear charge, reasonably constant shielding amp; decreasing atomic radius From N to O, however, t
  • In Crystal Field Theory what does Δo=10Dq mean?
    The theory was largely empirical and thus $\Delta_ {\mathrm {O}}$ was used This difference in energy levels could also be described in quantum systems and is called $\pu {Dq}$ after its quantum number The difference between the levels appeared to be $\pu {10Dq}$ I hope this is not a gross oversimplification, but a rather helpful one!
  • Effective nuclear charge of oxygen atom (O) vs oxygen anion (O2-)
    Comparing $\ce {O, O- and O^2-}$, the nucleus and inner electrons don't change, so you focus on the number of electrons in the outer shell Comparing isoelectronic species such as $\ce {O^2-, F-, Ne, Na+, Mg^2+}$, the number of electrons stays the same, but the nuclear charge (and the effective charge) change, so you would focus on that
  • Why is there a difference in the colours of K₂Cr₂O₇ and K₂CrO₄?
    A sweeping observation is that the transition metals compounds have orbitals which have electron transitions that are in the visible range of the electromagnetic spectrum so they are colored Most other inorganic compounds don't, and they are colorless So color is all about bond orbitals not just the oxidation the state of the metal
  • Comparison of C=O bond strength in metal carbonyls
    A common measure of $\ce {C-O}$ bond strength is $\ce {C-O}$ distance For $\ce { [Fe (CO)5]}$ the data can be found, for example, in paper 1, where values of 1 12-1 14 Å are reported For $\ce { [V (CO)6]-}$ in paper 2 values around 1 17-1 28 Å are reported As for rationalization, there are several factors in play here with opposite effect It is not possible to guess which one wins
  • Why o-Nitrophenol is more volatile than p-Nitrophenol?
    o-Nitrophenol forms intramolecular H bond whereas molecules of p-Nitrophenol get associated through intermolecular H bond During boiling, the strong intermolecular H bonding increases the boiling point but intramolecular H bonding cannot do so Therefore, o-Nitrophenol is more steam volatile than p-Nitrophenol





中文字典-英文字典  2005-2009