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Sodium-potassium alloy (liquid metal at room temperature)- Wikipedia
- PaulHoule 6y agoYou have to be careful working with this stuff, like keep it under argon as a cover gas. It burns in carbon dioxide, burns in water, and even burns in 1-propanol -- in the last case the burning is gentle enough you can use 1-propanol to wash spent nuclear fuel elements that were used in NaK.