出典:Wiktionary
出典:『Wiktionary』 (2025/08/19 14:49 UTC 版)
So named because it is the isotope of hydrogen that has one nucleon (a single proton and no neutrons).
hydrogen-1 (uncountable)
出典:Wikipedia
●注意
お探しになった「hydrogen 1」は、Weblio英和辞典にはまだ収録されていませんが、「hydrogen 1」に近い「Hydrogen atom」について、『ウィキペディア英語版』からの引用を下記に表示しています。
出典:『Wikipedia』 (2011/04/28 15:46 UTC 版)
A hydrogen atom is an atom of the chemical element hydrogen. The electrically neutral atom contains a single positively-charged proton and a single negatively-charged electron bound to the nucleus by the Coulomb force. The most abundant isotope, hydrogen-1, protium, or light hydrogen, contains no neutrons; other isotopes of hydrogen, such as deuterium, contain one or more neutrons. This article primarily concerns hydrogen-1.