What does lithium do in water?

Answer 1

Lithium floats one water because it is less dense (it has a density of 0.53 g/cm while water has a density of 1.0 g/cm3). On contact, however lithium an water react to form hydrogen gas and lithium hydroxide. The latter then dissolves in the remaining water.

Answer 2

Lithium is highly reactive in water. The chemical reaction that occurs forms lithium hydroxide and hydrogen.
It reacts quite violently to give off hydrogen leaving Lithium hydroxide 2Li + 2H2O = 2LiOH + H2

Answer 3

because lithium have low density. because lithium have low density.

Answer 4

Lithium reacts with water to produce lithium hydroxide and hydrogen gas. The reaction is slow compared to other alkali metals, but still releases enough heat to ignite the hydrogen gas produced.