Name the following compounds and specify which ones are best described as ionic: (a) \(\mathrm{KNO}_{2} ;\) (b) \(\mathrm{Br} \mathrm{F}_{3}\) (c) \(\mathrm{S}_{2} \mathrm{Cl}_{2} ;\) (d) \(\mathrm{Mg}(\mathrm{ClO})_{2} ;\) (e) \(\mathrm{Cl}_{2} \mathrm{O}\)

First, we name the given compounds using IUPAC nomenclature rules: (a) \(\mathrm{KNO}_{2}\) - Potassium Nitrite (b) \(\mathrm{BrF}_{3}\) - Bromine Trifluoride (c) \(\mathrm{S}_{2} \(\mathrm{Cl}_{2}\) - Disulfur Dichloride (d) \(\mathrm{Mg}(\mathrm{ClO})_{2}\) - Magnesium Chlorate (e) \(\mathrm{Cl}_{2} \mathrm{O}\) - Dichlorine Monoxide.

Now, we identify which of them are ionic. Ionic compounds are formed from a metal and a non-metal. (a) \(\mathrm{KNO}_{2}\) - Potassium Nitrite is an ionic compound as it contains metal ion Potassium(K) and non-metal ion Nitrite(NO2-). (b) \(\mathrm{BrF}_{3}\) - Bromine Trifluoride is not an ionic compound as it does not contain a metal. It is a covalent compound.(c) \(\mathrm{S}_{2} \(\mathrm{Cl}_{2}\) - Disulfur Dichloride is not ionic, it is a covalent compound involving only non-metals.(d) \(\mathrm{Mg}(\mathrm{ClO})_{2}\) - Magnesium Chlorate is an ionic compound involving Magnesium (a metal) and Chlorate (a non-metal).(e) \(\mathrm{Cl}_{2} \mathrm{O}\) - Dichlorine Monoxide is not an ionic compound as it does not contain any metals, it is a covalent compound.