The element that would produce a similar violent reaction with water to sodium is potassium (K).

Here's why:

* Similar Reactivity: Both sodium and potassium are alkali metals, located in Group 1 of the periodic table. Alkali metals are highly reactive due to their single loosely bound valence electron, making them eager to lose it and form positive ions.

* Exothermic Reactions: When these metals react with water, they release a significant amount of heat, making the reaction exothermic. The heat can ignite the hydrogen gas produced in the reaction, leading to a violent explosion.

Caution: Alkali metals are extremely reactive and dangerous to handle. Experiments involving these metals should only be conducted by trained professionals in a controlled environment.