Here's how it's derived:
* Ammonium ion (NH₄⁺): This is a polyatomic ion with one nitrogen atom and four hydrogen atoms.
* Chlorate ion (ClO₃⁻): This is another polyatomic ion with one chlorine atom and three oxygen atoms.
To create a neutral compound, the charges of the ions must balance. The ammonium ion has a +1 charge, and the chlorate ion has a -1 charge. Therefore, one ammonium ion and one chlorate ion combine to form ammonium chlorate (NH₄ClO₃).