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
138801查看　138801　在百度字典中的解释百度英翻中〔查看〕
138801查看　138801　在Google字典中的解释Google英翻中〔查看〕
138801查看　138801　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:


  • Group 7 Trends - A Level Chemistry Revision Notes - Save My Exams
    With increasing atomic size of the halogens (going down the group) their electronegativity, and therefore oxidising power, decreases Reaction between Halogen Hydrogen Gas The Appearance, Characteristics and Colour in Solution of the Halogens Unlock more, it's free!
  • Reactivity of Halogens: Why Decreases Down the Group?
    The low electronegativity of Carbon does not distort the chemical bond as much as the same bonds in N, O and F leaving a high electron cloud density in the Carbon to Hydrogen bond and results in a reasonably strong bond as compared to N - H, O - H or F - H which are polar covalent in nature
  • Why do halogen reactivities decrease down the group?
    Halogen reactivities decrease down the group due to an increase in atomic size and a decrease in effective nuclear charge In more detail, the reactivity of halogens, which are found in Group 7 of the Periodic Table, decreases as you move down the group from fluorine to iodine
  • SC17c- Halogen reactivity Flashcards - Quizlet
    Study with Quizlet and memorize flashcards containing terms like How does the reactivity of halogens change?, Why does the reactivity of the halogens decrease as you go down the group?, What is the effect of fluorine (at the top of the periodic table) on iron wool? and more
  • Explain Trends in Reactivity Down Group VII - sparkl. me
    Reactivity of halogens decreases down Group VII due to increasing atomic radius and decreasing electronegativity Fluorine is the most reactive halogen, while astatine is the least reactive Factors such as bond strength, electron affinity, and intermolecular forces significantly influence reactivity trends
  • Reactivity of Halogens | Algor Cards - Algor Education
    Exploring the reactivity of halogens in chemistry reveals a trend where reactivity decreases from Fluorine to Astatine This is due to atomic radius and electron shielding effects
  • Group 17: The Halogens | Solubility of Things
    In terms of chemical behavior, the halogens exhibit a clear trend in reactivity as you move down the group Fluorine is the most reactive, while astatine, being the heaviest member, shows significantly lower reactivity compared to its lighter counterparts





中文字典-英文字典  2005-2009