How can the Reactivity of Metals be shown? Use example with Magnesium, Zinc and Copper

-Simply place some Metals into Dilute Hydrochloric Acid eg -Then, with a burning splint test, the Noise of the 'Pop' will determine how Reactive it is. -Magnesium would have a very loud Pop, mainly because its a Group 2 Element, which are more Reactive naturally -Zinc would have a Pop, but quieter then Magnesium -Copper would have Nothing, its Very Unreactive -More Reactive a Metal is - the Faster the Reaction