Last Updated：2025/11/20

(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

Source Word

protium

Japanese Meaning

物理学: 水素の最も軽く、最も一般的な同位体。1個の陽子を持ち、中性子を持たない原子。

The sample contained a high concentration of protium, which influenced the reaction rate significantly.

その試料には水素の最も軽く最も一般的な同位体（¹₁H：水素‑1）が高濃度で含まれており、反応速度に大きな影響を与えました。

Sense（1）

(physics) The lightest and most common isotope of hydrogen, having a single proton and no neutrons: ¹₁H

So far there are no differences among the protiums extracted at various labs, except for concentration levels.

Sense（2）

An atom of this isotope.

protiums

（ plural ）