VCE Chem Unit 1 & 2 <> Unit 3 & 4 overlap

i've been getting asked a lot 'what in unit 1 & 2 is relevant for units 3 & 4 chem'?

and i got a bit tired of saying the same thing 'look at your syllabus and you'll know' LOL..

so i decided to do it myself and give it to you.

note: i've highlighted only the main overarching ideas