Question

17 of 20
which specific rule applies to the naming of all the compounds in the table?
chemical formula name of ionic compound
fe₂o₃ iron (iii) oxide
fe(no₃)₃ iron (iii) nitrate
fecl₂ iron (ii) chloride
feso₄ iron (ii) sulfate
a the anion is named first, followed by the cation ending in -ide or -ate.
b the cation is named first followed by the anion which ends in -ide if the compound is binary or ends with the name of the polyatomic anion in a ternary compound.
c the cation is named first, including a roman numeral for the charge of a transition metal, followed by the anion.
d the cation is named first, including a roman numeral for the charge of a transition metal, followed by the anion which ends in -ide if the compound is binary or ends with the name of the polyatomic anion in a ternary compound.

Explanation:

Step1: Analyze naming of ionic compounds

In ionic compounds with transition metals like Fe in given examples, cation (Fe with charge indicated by Roman numeral) is named first.

Step2: Check anion - naming rules

For binary compounds (e.g., Fe₂O₃, FeCl₂), anion ends in -ide. For ternary compounds (e.g., Fe(NO₃)₃, FeSO₄), anion is named as the poly - atomic anion. Option D correctly encompasses these rules.

Answer:

D. The cation is named first, including a Roman numeral for the charge of a transition metal, followed by the anion which ends in -ide if the compound is binary or ends with the name of the polyatomic anion in a ternary compound.