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by pmontra 1008 days ago
> water (H2O) cannot become radioactive itself

This was interesting. I researched it a little and found this on https://www.quora.com/Why-is-water-the-only-thing-on-Earth-t...

When hit by neutrons "hydrogen, move to another stable state and only become unstable when that particular atom gets hit twice" "Oxygen takes three absorptions to become radioactive" and underwater neutrons "activated mainly the sodium in the sea salt."