h₃o⁺ is the formula for the ion.

h₃o⁺ is the formula for the ion.

h₃o⁺ is the formula for the ion.

Answer

Brief Explanations:

The $H_3O^+$ ion is commonly known as the hydronium ion. It forms when a water molecule ($H_2O$) accepts a proton ($H^+$).

Answer:

hydronium