LECTURE (Week 3) – Unit 4 – Octet Rule and Writing Chemical Formulae

4.1 Understanding the construction of a chemical formula

Octet rule and valence electrons Writing chemical formulae

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Learn your ions!

Learn this list of ions. (Also available under Chemist’s Tools > Ions to Learn)

Cation: ammonium, NH4+ Anions: nitrate, NO3– acetate, C2H3O2– sulfate, SO42- hydroxide, OH– phosphate, PO43- carbonate, CO32- cyanide, CN– chlorate, ClO3– permanganate, MnO4– chromate, CrO42- dichromate, Cr2O72-

Hint: Make flash cards for learning the ions – on one side, write the . . . → Read More: Learn your ions!

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If you have problems with the video player, email Matt at mfong[at]ece.ubc.ca