What happens as you react water with -Lithium [Least Reactive] -Sodium -Potassium -Rubidium -Caesium [Most Reactive]

-Lithium simply would move around, and Fizzle Spontaneously -Sodium and Potassium do the Same, but can Melt in the Heat of the Reaction. Potassium goes a step further as it can Ignite the Hydrogen Gas that is Made -Rubidium and Caesium react very Aggressively with the Water, and can Explode if Wet.