The sequence below gives the reactivity order for some elements. $\text{K} \; \text{Na} \; \text{Ca} \; \text{Mg} \; \text{Zn} \; \text{Fe} \; (\text{H}) \; \text{Cu}$ Which of the following statements about the reactivity of these metals is correct?
- ACopper reacts with steam to form hydrogen gas.
- BMagnesium is more reactive than calcium.
- CPotassium reacts with water to form hydrogen gas.
- DSodium oxide is reduced by carbon to sodium.