Alkali Metals - Reactivity with Water

The video explores the reactivity of Group 1 elements with water, highlighting how reactivity increases down the group. Lithium reacts with water, releasing hydrogen and fizzing. Sodium's reaction generates enough heat to melt it. Potassium's reaction ignites the gas produced. The video speculates on rubidium's reaction and demonstrates cesium's intense reactivity, emphasizing the trend of increasing reactivity from lithium to cesium.

Predict how rubidium will react with water based on the trends observed.

How does the reactivity of cesium compare to that of lithium?