F.4 chem ionic structure

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!

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: )