Chemistry Question: Correct Chemical Formula for AgZ Compound Explained

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The discussion centers on determining the correct chemical formula for the compound AgZ, where Ag has a +1 charge, indicating that the Z anion must have a -1 charge. This charge relationship is crucial for understanding the formation of ionic compounds. The examples given, such as CaZ2 and Al2Z3, illustrate how the charge of the cation influences the number of anions needed for a stable compound. Specifically, since Ca has a +2 charge, it requires two Z anions to balance the charge. Understanding these charge interactions is essential for solving related chemistry problems on the final exam.
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If an element Z forms a compound with the formula AgZ, which of the following is a correct chemical formula?

-CaZ2
-Al2Z3
-H2Z
-NaZ3

I don't really understand this at all and there is going to be decent amount of them on my final exam! please any help
 
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Think charges. Since AgZ is an ionic compound, what charge must the Z have? How does this charge tell you whether a certain compound (CaZ2, Al2Z3, etc) is possible?
 
CaZ2

Ag ion has a charge of +1 which mean the charge on the Z anion must be -1.

Ca ion has a charge of +2, so it takes two Z anions to bond with it.
 
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