Question

Why is caesium more reactive than rubidium. Give reason ASAP

Answer 1

Answer:

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Like other alkali metals, rubidium metal reacts violently with water. As with potassium (which is slightly less reactive) and caesium (which is slightly more reactive), this reaction is usually vigorous enough to ignite the hydrogen gas it produces.

Answer 2

Explanation:

Caesium being lower than rubidium in a period has larger atomic size higher metallic character and therefore it is more reactive than rubidium