![]() ![]() Polyatomic ions contain more than one atom. The rules for naming ionic compounds containing polyatomic ions are different. Naming Ionic Compounds that Contain Polyatomic Ions Step 4: Check if any prefixes are required Because there are no ionic charges to balance out molecular compounds, therefore you should use prefixes shown in the table below:įor instance, is named as carbon dioxide and CO is named as carbon mono oxide. For instance, FeCl is named as iron (I) chloride and is named as iron (II) chloride. ![]() If you have ionic compounds with transition metals, then you should add a roman numeral after the metal name to show the transition metal's charge. Step 3: Check if you require roman numerals Look for an ionic compound that has a transition metal that becomes a multivalent ion. For instance, if the second compound is chlorine, then you should remove "ine" and replace it with "ide", so that we can spell it "chloride". This rule is same for molecular or ionic compounds. Step 2: To the end of the second compound's name, add the word "ide" After you have determined a molecular or ionic compound, the next step if to look at the second compound and replace the last three words with "ide". Nonmetals are present on the right side of the periodic table above the staircase, including hydrogen)
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