Solution:
The Reactivity series of metals is:
K>Na>Ca>Mg>Zn>Fe>Pb>Cu>Ag
Potassium (K) and sodium (Na) are extremely reactive metals that react vigorously with cold water. Ca reacts quickly with cold water, whereas Mg reacts slowly. Metal oxides are easily formed when K, Na, and Ca react with steam but Ca has a high potential to create oxide than Na and K, due to its high charge density.
