The first lesson is writing binary compound tutorial. Binary means 'two', a cation, or positively charged ion, and an anion, or negatively charged ion. Binary ionic formulas are made from a metal and a nonmetal or a cation and an anion. Anions, such as Cl- are called chloride as opposed to Cl, chlorine, an element.
There are some common polyatomic ions: nitrate, phosphate, sulfate, carbonate, bicarbonate, acetate, ammomium, and hydroxide. Learn these.
Lastly, is the Stock System. Iron II, Iron III, Copper I, and Copper II are used extensively and may crop up on the ACT.
Our class made element cards before class began and have tested on the Periodic Table. It really helps to make and name the cards in order to memorize their names and formulas. Module 3 in Apologia Chemistry has detailed explanations.
Yes, I use the cheesy red cat and blue ant to emphasize cations are positive and anions are negative.
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