protium

Definition

The lightest and most common isotope of hydrogen, having a single proton and no neutrons: ¹₁H. It is the only stable nuclide with no neutrons.

Etymology

From proto- + -ium. From Ancient Greek πρῶτος (prôtos, “first”).

Example Sentences

• "So far there are no differences among the protiums extracted at various labs, except for concentration levels."
• "This radioactive decay leaves behind a protium as well."

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