Answer:Hi. I’m glad you asked me this question.
Fe2(PO3)2 is an ionic compound composed of two iron (II) cations, Fe2+, and two phosphite anions, PO3 3-. To find the written formula of an ionic compound, you need to balance the charges of the ions so that the overall compound is electrically neutral. One way to do this is to use the crisscross method1, which involves swapping the numerical values of the charges and using them as subscripts for the ions. For example:
Write the symbol and charge of the cation (metal) first and the anion (nonmetal) second.
Fe2+ PO3 3-
Swap the numerical values of the charges and use them as subscripts for the ions. If the charge is 1, omit the subscript.
Fe3(PO3)2
Simplify the subscripts if possible by dividing them by their greatest common factor.
Fe2(PO3)2
Write the final formula using parentheses around the polyatomic ion if there is more than one of them.
Fe2(PO3)2
This is the written formula of the ionic compound. I hope this helps you understand how to write formulas for ionic compounds. If you want to learn more, you can watch some videos234 or read some articles5678 that explain this topic in more detail. Have a nice day!
Step-by-step explanation: