Lithium, sodium, potassium are all metals that react with water to liberate hydrogen gas. Is there any similarity in the atoms of these elements?

Explanation

Lithium, sodium and potassium all react with water to form alkalies, i.e., lithium hydroxide, sodium hydroxide, potassium hydroxide, etc. with the liberation of hydrogen gas.
`underset("Lithium")(2Li) + underset("Water")(2H_(2)O) rarr underset("Lithium hydroxide")(2LiOH) + underset("Hydrogen")(H_(2))`
`underset("Sodium")(2Na) + underset("water")(2H_(2)O) rarr underset("Sodium hydroxide")(2NaOH) + underset("Hydrogen")(H_(2))`
`underset("Potassium")(2K) + underset("water")(2H_(2)O) rarr underset("Potassium hydroxide")(2KOH) + underset("Hydrogen")(H_(2))`
All these metals have one electron in their respective outermost shells. Thus, they have similar chemical properties.