Aidentify the most reactive alkali metal with water. identify the most reactive alkali metal with water. rb li k na cs

The most reactive alkali metal with water is CAESIUM. This is because,  reactivity with water increases as one goes down the group of the alkali metals in the periodic table. Thus, the lower the alkali metal in the group the higher its reactivity with water. Ceasium is the last element in the alkali metal group that is why it has the highest reactivity with water.