Question

Are polyatomic ions molecular compounds or ionic compounds?

Answer 1

A chemical compound is a material made up of numerous similar molecules (or molecular entities) that are bound together by chemical bonds and contain atoms from many elements. As a result, a molecule made up of only one element's atoms is not a compound.
Depending on how the component atoms are kept together, there are four types of compounds:
Covalent bonding holds molecules together.
Ionic bonds hold ionic substances together.
Metallic bonds hold intermetallic compounds together.
Coordinate covalent bonds hold some complexes together.

Complete answer:
Polyatomic ions are ions. Covalent bonds, on the other hand, hold the atoms in polyatomic ions together. Ionic chemicals are those that include polyatomic ions. Ionic compounds are formed when a positive ionic metal reacts with a negative ionic non-metal, according to the fundamental rule of thumb. An ion from the metalloid staircase's left side and an ion from the metalloid staircase's right side. A molecule produced between two nonmetals from the right of the metalloid staircase is called a molecular compound. By sharing valence electrons, each nonmetal completes the octet rule.
A polyatomic ion, also known as a molecular ion, is a covalently linked set of two or more atoms, or a metal complex, that behaves as a single unit and has a net charge greater than zero. This chemical species is an ion, as opposed to a molecule, which has a net charge of zero.
The hydroxide ion, which is made up of one oxygen atom and one hydrogen atom and has a net charge of one, is a simple example of a polyatomic ion. Its chemical formula is $O{{H}^{-}}$ . An ammonium ion, on the other hand, has a charge of +1 and is made up of one nitrogen atom and ‘'four" hydrogen atoms; its chemical formula is $N{{H}_{4}}^{+}$. In acid–base chemistry and the production of salts, polyatomic ions are frequently used. A polyatomic ion is frequently thought of as the conjugate acid or base of a neutral molecule. The polyatomic hydrogen sulphate anion ($HS{{O}_{4}}^{-}$) is the conjugate base of sulfuric acid (${{H}_{2}}S{{O}_{4}}$), for example. The sulphate anion ($S{{O}_{4}}^{2-}$) is formed when another hydrogen ion is removed.

Note:
For understanding the nomenclature of polyatomic anions, there are two "rules" to follow. When the prefix bi is added to a name, it adds a hydrogen to the ion's formula and increases its charge by one, the latter being due to the +1 charge of the hydrogen ion. An option to the bi- prefix is to replace it with the term hydrogen: the anion produced from ${{H}^{+}},C{{O}_{3}}^{2-},HC{{O}_{3}}^{-}$, might be referred to as bicarbonate or hydrogencarbonate.