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


  • Polyatomic ions (article) | Khan Academy
    Bonding with polyatomic ions Like monatomic ions, polyatomic ions participate in ionic bonds with other ions (but remember, the atoms within a polyatomic ion molecule are held together by covalent bonds, which we will cover in more detail in the next lesson) Polyatomic ions combine with other ions in a ratio that produces a neutral compound
  • Polyatomic ions - Khan Academy
    In this article, we will discuss polyatomic ions The prefix poly- means many, so a polyatomic ion is an ion that contains more than one atom This differentiates polyatomic ions from monatomic ions, which contain only one atom Examples of monatomic ions include Na + , Fe 3 + , Cl , and many, many others This article assumes you have a knowledge of basic monatomic ions as well as the
  • Polyatomic ions (article) | Khan Academy
    Bonding with polyatomic ions Like monatomic ions, polyatomic ions participate in ionic bonds with other ions (but remember, the atoms within a polyatomic ion molecule are held together by covalent bonds, which we will cover in more detail in the next lesson) Polyatomic ions combine with other ions in a ratio that produces a neutral compound
  • Polyatomic ions (apply) (practice) | Khan Academy
    Apply your knowledge of polyatomic ions in this set of free practice questions
  • Naming ions and ionic compounds (article) | Khan Academy
    Learn how to name positive ions (cations), negative ions (anions), and ionic compounds involving main group elements
  • Common polyatomic ions (video) | Khan Academy
    Reviewing the common polyatomic ions, and explaining common suffixes and prefixes to help remember the formulas
  • Common polyatomic ions (video) | Khan Academy
    Let's review the common polyatomic ions, and look at the common suffixes and prefixes to help remember the formulas
  • Khan Academy
    Oops Something went wrong Please try again Uh oh, it looks like we ran into an error You need to refresh If this problem persists, tell us
  • Naming acids and bases (article) | Khan Academy
    To write the formula of a base when given the name, work backwards, just like with ionic compounds Write the symbol for the cation and anion, then use subscripts to indicate the lowest whole-number ratio of ions that results in a neutral compound If you need more than one polyatomic ion, place it in parentheses For example:
  • Naming monatomic ions and ionic compounds - Khan Academy
    Learn how to name monatomic ions and ionic compounds containing monatomic ions, predict charges for monatomic ions, and understand formulas





中文字典-英文字典  2005-2009