Last Updated：2025/11/21
Sentence
核実験では、質量数45のスカンジウムが信頼できる基準として用いられました。なぜならそれはスカンジウムの唯一の安定同位体で、陽子21個と中性子24個から成るからです。
Quizzes for review
In nuclear experiments, scandium-45 served as a reliable reference, since it is the only stable isotope of scandium, containing twenty-one protons and twenty-four neutrons.
See correct answer
In nuclear experiments, scandium-45 served as a reliable reference, since it is the only stable isotope of scandium, containing twenty-one protons and twenty-four neutrons.
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