Nuclei, isotopes and time
Hydrogen-1 and deuterium are both hydrogen because each nucleus has one proton, but deuterium also has one neutron.
ここから始める
Hydrogen-1 and deuterium are both hydrogen because each nucleus has one proton, but deuterium also has one neutron.
考えをつなぐ
Hydrogen-1 and deuterium are both hydrogen because each nucleus has one proton, but deuterium also has one neutron.
After three half-lives, an ideal radioactive population has one eighth of its initial undecayed nuclei remaining.
A half-life does not mean every nucleus survives exactly that long; it is a statistical property of a population.
具体的な確認点
Isotopes share a proton number but differ in neutron number. Some are unstable, and their populations follow statistical decay laws described by half-life.
さらに深く
参考資料
IUPAC · CIAAW 2024 · NIST · BIPM SI Brochure