What happens when you mix Caesium and Water?

KABOOM! Caesium meets Water

Caesium gives up its outer electron more easily than almost any other element. The moment it touches water it explodes, releasing hydrogen and a burst of heat.

The result

What it makes
Caesium hydroxide + hydrogen gas
Equation
2Cs + 2H₂O → 2CsOH + H₂
When it happens
At room temperature

Fun fact from Fizzy: The explosion can be strong enough to shatter the container, even with a tiny piece!

🥽 Never try this! Caesium explodes on contact with water.

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