Question

indicate the type of particle represented by the formula. cu(no3)2 co2 fe br2 nh4^+ bao

Explanation:

• \(Cu(NO_3)_2\): It is an ionic compound. In solid state, it exists as formula units. A formula unit represents the lowest - whole - number ratio of ions in an ionic compound. Copper nitrate \((Cu(NO_3)_2)\) consists of \(Cu^{2 + }\) and \(NO_3^-\) ions.
• \(CO_2\): Carbon dioxide is a covalent compound. Covalent compounds are made up of molecules. A molecule of \(CO_2\) is formed by the sharing of electrons between carbon and oxygen atoms (\(O = C=O\)).
• \(Fe\): Iron (\(Fe\)) is an element. In its elemental form (like in solid iron metal), it is composed of atoms.
• \(Br_2\): Bromine \((Br_2)\) is a diatomic covalent molecule. Two bromine atoms share electrons to form a covalent bond (\(Br - Br\)), so it is a molecule.
• \(NH_4^+\): The ammonium ion \((NH_4^+)\) has a positive charge. Ions are particles with a net electric charge. Here, the ammonium ion is a poly - atomic ion.
• \(BaO\): Barium oxide is an ionic compound. It consists of \(Ba^{2+}\) and \(O^{2 - }\) ions. In the solid state, it exists as formula units.

Answer:

\(Cu(NO_3)_2\): formula unit; \(CO_2\): molecule; \(Fe\): atom; \(Br_2\): molecule; \(NH_4^+\): ion; \(BaO\): formula unit.