What is the meaning of the criss cross rule?
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wat is the criss cross rule???the meaning of criss cross rule
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Answer:
Let's say you want to know what is the formula of Aluminum oxide. You know that oxides always have a negative 2 charge and Aluminum is always a positive 3 charge. So if you have 2 positive 3 charges that would be a positive 6, and if you had 3 negative 2 charges that would be a negative 6 and that would allow the charges to cancel out to a zero. So the formula would be Al2O3 for aluminum oxide. In other words, the criss cross method of determining the formula uses the charge of the opposite ion to determine how many atoms to use. It criss crosses.
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