chemistry questions, be the first to answer?

stouy

New member
CAN YOU PLEASE HELP ME OUT

charged ions:

1.[KMnO4]^- find the charge of Mn
2.[Cr2O4^2]^- find the charge of Cr
3.[NH4FeSO4]^+ find the charge of Fe
4.[H3PO3] find the charge of P

* can you explain what a radical is and give examples
 
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