Chemistry – Metals - Properties of metals | e-Consult

The reactivity of metals with cold water and steam varies significantly. Some metals react vigorously, some react slowly, and some do not react at all. The reactivity is generally related to the metal's position in the reactivity series.

• Highly Reactive Metals (e.g., Sodium, Potassium): React vigorously with cold water, producing hydrogen gas and a metal hydroxide. The reaction can be exothermic and potentially dangerous.
• Moderately Reactive Metals (e.g., Magnesium, Calcium): React with steam, but the reaction is slower than with cold water. They produce hydrogen gas and a metal oxide.
• Less Reactive Metals (e.g., Iron, Zinc): Generally do not react with cold water or steam under normal conditions. However, they may react slowly if the surface is not clean.

The reaction with steam is a specific case of a reaction with water, where the water is in the gaseous phase. The products are similar to those formed with cold water, but the reaction rate can be slower.