The atomic number is 9 Ions have the same atomic number since atomic number signifies number of protons not electrons
Answer:A
Explanation:becuse they waste less heat energy
Answer:
It is already balanced equation
Zinc because the only metals that would be able to reduce copper ions in solution would be hydrogen, lead, tin, nickel, iron, zinc, aluminum, Magnesium, sodium, calcium, potassium, and lithium. and according to your answer choices Zinc is the answer.
