None of them act violently with water, but the answer is Iron because Copper only reacts with dilute acids.
iron
Nothing happens, because copper is below iron in the reactivity series, so it can't displace iron in iron compounds
It takes the oxygen from air because without the presence of air, iron cannot turn into ferric oxide. The iron first reacts with air and then reacts with water to form rust.
Magnesium, Iron, Copper,sodium and potassium
Nails are made of iron, but pennies are copper and zinc. Iron reacts with oxygen to form rust, but copper on the outside of a penny does not.
copper sulphate+iron+water
The reason that some statues go green is because they contain copper, and when copper reacts water in covers in a coating that protects it. The same happens when Iron reaches water, but this coating is known as rust. This is called Tarnishing.
either potassium, sodium, zinc, iron or copper !
Gold is least reactive.
iron
Water. ---------- Oxygen
Copper does not react with water, but it slowly reacts with atmospheric oxygen forming a layer of brown-black copper oxide. Unlike the iron oxidation, this oxide prevents the bulk corrosion of parent material i.e. copper.