Question

Name the following

A metal that reacts with cold water.

Answer 1

1. The elements that have the tendency to lose electrons and thereby form positively charged element is metals.
2. The metals that are highly reactive undergo a chemical reaction with even cold water.
3. The alkali metal Sodium$\mathbf{\left(}\mathit{N}\mathit{a}\mathbf{\right)}$, reacts violently with cold water forming Hydrides and Hydroxides.
4. The equation is,

$2Na+2H_{2}O\to \underset{Sodiumhydroxide}{2NaOH}+\underset{Hydrogen}{H_2}$

So the metal that reacts with cold water is Sodium, $\mathbf{\left(}\mathit{N}\mathit{a}\mathbf{\right)}$.