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  1. you have not noted down the important key word: "vacant" d orbitals Since phosphorus...

    分類:科學及數學 > 化學 2011年03月13日

  2. It is easy to note down the answer even without seeing your solution. 1. NaCl solution can...

    分類:科學及數學 > 化學 2008年04月10日

  3. ...electron(s) in the outermost shell is/are lost more readily to give a cation. Note that the reactivity of element decreases down Group VII. Besides, elements from Group...

    分類:科學及數學 > 化學 2007年03月24日

  4. ...citric acid. Neutralization occurs. 2007-01-14 12:34:13 補充: Note the lemon juice is only in contact of the wok for a SHORT PERIOD...

    分類:科學及數學 > 化學 2007年01月19日

  5. ...no. ENC generally increases across the period, and decreases down the group. 3. you can do that. note the specify "the effective nuclear charge with respect to outermost electron". as ...

    分類:科學及數學 > 化學 2011年01月01日

  6. .... The product magnesium sulphate is soluble in water. Note : group II sulphate solubility's in water DECREASES down the group i.e. solubility of MgSO4 > CaSO4> etc. However...

    分類:科學及數學 > 化學 2011年06月05日

  7. ... the cap if any. 2. place the needle up with plunge down . 3. tap the trapped air such that all the air ...any. 5. Push the plunge slowly to expel the air. Note : for volatile liquid, it should not easily form bubbles...

    分類:科學及數學 > 化學 2007年10月02日

  8. ..., just like water. You boil it, but after you can easily to cool it down . Unlike cooked eggs, it is a chemical change. Please note that chemical change is nearly impossible to be reversed again, which ...

    分類:科學及數學 > 化學 2009年01月02日

  9. Firstly we have to note how to distinguish from mixtures(混合物) and compounds... (2 Chlorines) .Easily to be broken down /Easily to separate them .Mixtures is...

    分類:科學及數學 > 化學 2009年01月03日

  10. 1. Melting of ice is a physical change, not chemical reaction, please note that. When ice is turned into water, i.e. ice is melt...

    分類:科學及數學 > 化學 2011年11月17日