protium

n. 三种氢的同位素中质量最轻者

发音

UK /ˈpɹəʊ.tiəm/
US /ˈpɹoʊ.tiəm/

词形变化

protiums 复数 protiums

释义与例句

n.
  1. 1.

    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.

    氕

    物理

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

  2. 2.

    An atom of this isotope.

    This radioactive decay leaves behind a protium as well.

词源

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

来源：wiktionary