出典:Wikipedia
出典:『Wikipedia』 (2011/05/01 01:00 UTC 版)
●注意
お探しになった「hydrogen-3」は、Weblio英和辞典にはまだ収録されていませんが、「hydrogen-3」に近い「Tritium」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』 (2011/07/13 14:28 UTC 版)
Tritium ( /ˈtrɪtiəm/ or /ˈtrɪʃiəm/; symbol T or 3
H, also known as hydrogen-3) is a radioactive isotope of hydrogen. The nucleus of tritium (sometimes called a triton) contains one proton and two neutrons, whereas the nucleus of protium (by far the most abundant hydrogen isotope) contains one proton and no neutrons. Naturally occurring tritium is extremely rare on Earth, where trace amounts are formed by the interaction of the atmosphere with cosmic rays. The name of this isotope is formed from the Greek word "tritos" meaning "third."