Common Polyatomic Ions

The correct chemical formula for the ammonium ion is NH4+ which consists of one nitrogen atom and four hydrogen atoms with a positive charge. NaCl is the formula for common table salt, H2O is the formula for water, and CO2 is the formula for carbon dioxide.

NO2 with a negative charge is called nitrite. Nitrate, nitrogen dioxide, and nitrile are different chemical compounds with distinct properties.

The correct answer is NO3-, which represents the nitrate ion, commonly found in compounds like potassium nitrate (KNO3) and sodium nitrate (NaNO3). The other options provided are the carbonate ion (CO3-2), sulfate ion (SO4-2), and ammonium ion (NH4+), which have different chemical formulas and properties.

SO3 with a charge of 2- is known as sulfite, not sulfate, sulfide, or sulfur trioxide.

The correct chemical formula for SO4 with a charge of 2- is sulfate.

HSO4(charge -) is commonly known as hydrogen sulfate or bisulfate, not to be confused with other sulfur compounds like sodium sulfate, sulfuric acid, or hydrochloric acid.

OH(charge -) is the hydroxide ion which consists of one oxygen atom and one hydrogen atom with a charge of -1. It is commonly found in bases and forms when a water molecule loses a hydrogen ion (H+) to leave a hydroxide ion (OH-).

The correct chemical formula for cyanide is CN-, while nitrate is NO3-, carbonate is CO3^2-, and chloride is Cl-.

PO4 with a charge of 3- is the phosphate ion commonly found in compounds such as DNA, ATP, and phospholipids.

The correct chemical formula for HPO4 with a charge of 2- is hydrogen phosphate. Hydrogen peroxide is H2O2, phosphorus pentoxide is P2O5, and hydrogen sulfide is H2S.

CO3 with a charge of 2- is the carbonate ion, which consists of one carbon atom and three oxygen atoms. Carbide is a compound of carbon and another element, chlorate is a polyatomic ion with a chlorine atom and three oxygen atoms, and carbonite is not a valid chemical compound.

The correct chemical formula for bicarbonate is HCO3⁻, which represents a hydrogen carbonate ion with a negative charge.

Hypochlorite is a chemical anion with the formula ClO^-. The correct answer represents an anion with a single chlorine atom and oxygen atom with a negative charge.

The correct chemical formula ClO2 is associated with the ion chlorite, not chlorine, chlorate, or chromite.

In the chemical formula ClO3 with a negative charge, it represents the chlorate ion, which consists of one chlorine atom and three oxygen atoms. It is not to be confused with chloride which is Cl- (charge -1), chlorine dioxide with formula ClO2, or chlorine monoxide which is ClO.

The correct chemical formula for perchlorate is ClO4, where the chlorine atom is surrounded by four oxygen atoms. It carries a negative charge.

The correct chemical formula for acetate is C2H3O2, which represents the acetate ion. CO2 is carbon dioxide, H2O is water, and NaCl is table salt, none of which are the correct chemical formula for acetate.

The MnO4- ion is actually called permanganate, not manganese oxide, manganese tetraoxide, or manganate.

The correct chemical formula for Cr2O7(2-) is dichromate, which is a polyatomic anion containing two chromium atoms and seven oxygen atoms. The other options provided are incorrect chemical compounds.

CrO4 with a charge of 2- is known as chromate. The incorrect answers do not correspond to the correct chemical formula for CrO4.

The correct chemical formula for O2 with a charge of 2- is peroxide. Peroxide is a compound containing an oxygen-oxygen single bond (O-O) and has a charge of 2-.