Answer: The charge on a hypothetical ion with 25 protons and 22 electrons is +3.
Step-by-step explanation:
Atomic number is defined as the number of protons or number of electrons that are present in an atom in an electrically neutral atom.
Atomic number = Number of electrons = Number of protons
Given : Number of protons = 25
Number of electrons = 22
When an atom looses its electron, it results in the formation of a positive ion which is known as cation and when an atom gains electron, it results in the formation of a negative ion known as anion.
Thus if an atom has 25 protons and 22 electrons that means it has 3+ charge as there are 3 extra protons as compared to electrons.