F.4 chem ionic structure

"Since caesium is larger in size than sodium ion, each ion is surroundes by 8 chloride ion"

點解caesuin個size大d就會比多d chloride ion包住?!

同埋點樣知道1粒ion比幾多其他ion包住?!

thx~~

2 個解答

評分
  • 9 年前
    最愛解答

    DSE syllabus only covers two ionic compounds, NaCl and CsCl.

    What you need to know is:

    - Cl ions are larger than Na ions.

    - The definition of "coordination number", which means the number of surrounding ions of an ionic compound, for example, each Na ion is surrounded by 6 Cl ions. Therefore, the coordination number is six for NaCl. And you have to know the coordination number of CsCl is eight.

    Your textbook illustrates the crystal lattice structures of the above-named compounds, you will have to know how to draw the part of the structures.

    I think your questions are already out of the syllabus, especially "點樣知道1粒ion比幾多其他ion包住?!".

    The properties of the 4 structures are more likely the main point of your chapter!

    資料來源: My teacher + a S4 chemistry textbook
  • 匿名
    9 年前

    其實主要係

    大粒d 佢就可以比多d ions 圍住

    例如波子

    1粒波子可能可以比8粒波子圍住

    不過

    如果係1個乒乓波

    佢可能可以比20幾粒波子圍住

    我個理解係咁...

    至於點知

    首先就係細=>6 大=>8

    其實佢都唔會話考到好難

    真係考都會比埋你

    放心: )

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