Which of these metals reacts with water at normal temperature?

Sodium reacts vigorously with cold water at room (normal) temperature.

It forms sodium hydroxide (NaOH) and releases hydrogen gas, often with enough heat to ignite the hydrogen.

​$$2Na + 2H_2O \rightarrow 2NaOH + H_2\uparrow$$​​

Mercury: Does not react with water.

Aluminium: Protected by a strong oxide layer; does not react with water at normal temperature.

Magnesium: Reacts very slowly with cold water; reaction is not significant at normal temperature.

Alkali metals like Lithium, Sodium, Potassium react quickly with water.

Sodium is stored in kerosene to prevent accidental reaction with moisture.