The formula CaNO₃₂ is incorrect. Here's why and how to get the correct answer:

* Nitrate Ion: The nitrate ion (NO₃⁻) has a charge of -1.

* Calcium Ion: The calcium ion (Ca²⁺) has a charge of +2.

* Balancing Charges: To balance the charges, you need two nitrate ions for every calcium ion.

The correct formula is Ca(NO₃)₂.

Now, to answer your question:

* There is one calcium atom (Ca) in the compound Ca(NO₃)₂.

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