Question

Which metal reacts with cold water?

Answer 1

Alkali Metals:

• Highly reactive metal is that which interacts with cold water.
• The most reactive metals in the periodic table are the alkali metals.

Reaction with cold water:

• Lithium$\left(\mathrm{Li}\right)$, Sodium$\left(\mathrm{Na}\right)$, Potassium$\left(\mathrm{K}\right)$, Rubidium$\left(\mathrm{Rb}\right)$, Caesium$\left(\mathrm{Cs}\right)$, and Francium$\left(\mathrm{Fr}\right)$, all react violently or even explosively with cold water to displace hydrogen.
• For information on the reactions of metals with water or acids or certain displacement processes, the reactivity series in chemistry is employed, where metals are sorted by their reactivity from greatest to lowest, as shown below.

• As you can see in the chart, Potassium$\left(\mathrm{K}\right)$ is top in reaction with water.

Final Answer:

Potassium $\left(\mathrm{K}\right)$ highly reacts with water and many more.