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Determining formulas for ionic compounds The (+) and (-) charges must cancel each other to make a neutral compound. Mg +2 and Cl -1 make MgCl 2 Because you need 2 Cl - to cancel the +2 charge on Mg. What is the formula for a compound of Al and O ? Al +3 O -2. - PowerPoint PPT Presentation
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Determining formulas for ionic compounds
The (+) and (-) charges must cancel each other to make a neutral compound.
Mg+2 and Cl-1 make MgCl2
Because you need 2 Cl- to cancel the +2 charge on Mg
What is the formula for a compound of Al and O?
Al+3 O-2
What is the formula for a compound of Al and O?
Al+3 O-2
Find the least common multiple 3+ X 2 = 6+ 2- X 3 = 6-
Al2O3
A force can shatter an ionic crystal.