Electronegativity of the two atoms is your answer
False because they can turn back to their original form a chemical change would be like burning paper it can’t be changed back to it’s original offer it’s burnt
Al 1s²2s²2p⁶3s²3p¹ - 3e⁻ → Al³⁺ 1s²2s²2p⁶
_________
Answer:
Because looking at the reactivity series of both elements Calcium is more reactive than hydrogen.
