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The ions turn back into the ionic compound (salt or lattice of atoms) when the water is evaporated, they are no longer ions. Is this what you are confused at? (I also think the source is quite confusing)

Wait, I thought atoms emit colours because the electrons become excited. I have no idea how did ions gett involved.

" bettereducation.com.au/Results/Hsc.aspx " find your school at this site and press into the DA of your school, you should find the number of band 6 for each subject in your school. You may know this site already but hope it may help

Not so much for ext 1 and 2 maths, based on my school (which have a similar ranking), but ranking in sciences definitely have a large effect (some years there are 3 or 4 band 6, some years only have 1). But again, this may not apply to you because schools are different from each other.

Not sure about your school, but my school have a similar ranking and the quality of the cohort is drastically different years to years (can jump from 160 to 110 and vice versa), so definitely top 5 in all subject for a secured 90+. You said 90+ atar so I assume that you do not just want a low...

I started 4 unit maths this term and there is a model of calculator that can calculate complex numbers, it is necessary to buy it (fx-100 Au plus) and is it helpful in exams? Because some people said it's quite useless in 4 unit maths.

I think the quote that come after this is "Until they become conscious they will never rebel, and until after they have rebelled they cannot become conscious." from chapter 7 part 1, I am bad at English but there may be techniques when it is juxtaposes with this one, hope this may help you

For me, I prefer typing the class notes and handwrite during the revision summary. Don't know if that will suit you

Thank you guys

How should I use my reading time in maths and science exams? Should I start to do the multiple choice questions straight away or should I read through the paper? Can someone gives some tips for using the reading time, it would be very helpful, thanks.