What is the chemical formula for bromate?

Bromate is an ion formed from bromine and oxygen. The correct chemical formula for the bromate ion is BrO3 with a negative one charge, which can be written as BrO3(-). This ion consists of one bromine atom covalently bonded to three oxygen atoms. The negative charge indicates that it has gained an electron, which is typical for polyatomic ions as they tend to acquire a charge due to the loss or gain of electrons.

The other formulas do not accurately represent bromate. For instance, BrO2(-) indicates a different ion known as bromite, which contains only two oxygen atoms. The formula BO3(3-) represents borate, a completely different anion containing boron. Lastly, AsO4(3-) is the formula for arsenate, involving arsenic and not bromine. Therefore, recognizing the specific elements and their respective atoms is crucial to identifying the correct chemical formula for bromate.