one calcium atom for every two iodine atoms Express your answer as a chemical formula. A chemical reaction does not occur for this question. Part B two nitrogen atoms for every four oxygen atoms Express your answer as a chemical formula. A chemical reaction does not occur for this question. one silicon atom for every two oxygen atoms Express your answer as a chemical formula. A chemical reaction does not occur for this question. Part D one zinc atom for every two chlorine atoms Express your answer as a chemical formula. ? A chemical reaction does not occur for this