Ionic with a polyatomic ion.
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KOH is an ionic compound with a polyatomic ion. The hydroxide ion (OH-) is a polyatomic ion that is composed of one oxygen atom and one hydrogen atom.
Na2Cr2O7 is an ionic compound with a polyatomic ion. The polyatomic ion present in this compound is the chromate ion (Cr2O7)^2-.
Polyatomic ions are named with their specific names, regardless of their overall charge. When naming an ionic compound with a polyatomic ion, the name of the cation is written first followed by the name of the anion (polyatomic ion).
The charge of the polyatomic ion is occasionally included in the chemical formula for a compound containing it. This charge is never used in a binary ionic compound because binary compounds involve only two elements with differing charges, while polyatomic ions already contain multiple elements and an overall charge.
Polyatomic ions can have both ionic and covalent bonds. Ionic bonds are formed between the positively and negatively charged ions within the polyatomic ion, while covalent bonds are formed by sharing electrons between the atoms within the polyatomic ion.
Silver nitrate is AgNO3 so it is not a binary compound as it contains three elemnts. The term binary ionic is unusual - chemists normally say a binary compound, binary ionic may be taken to mean just two sorts of ions in which case it would be classified as a binary ionic as ther are two ions Ag+ and NO3-