Question

ammonium chloride is a polyatomic ionic compound. it is an active ingredient in some cough syrups. write the chemical formula for ammonium chloride. refer to a periodic table and a list of polyatomic ions.

Explanation:

Step1: Identify ions

Ammonium ion is $NH_4^+$ and chloride ion is $Cl^-$.

Step2: Balance charges

The + 1 charge of $NH_4^+$ and - 1 charge of $Cl^-$ balance each other.

Answer:

$NH_4Cl$