Last Updated
：2025/11/20
protium
（ plural ）
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(physics) The lightest and most common isotope of hydrogen, having a single proton and no neutrons: ¹₁H / An atom of this isotope.
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protium
The sample contained a high concentration of protium, which influenced the reaction rate significantly.
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The sample contained a high concentration of protium, which influenced the reaction rate significantly.
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