为什么科学家关心它
Radioactivity is part of the shared Mendeleev scientific core. This page is intentionally conservative until more native-language terminology is verified.
一个具体例子
After three half-lives, an ideal radioactive population has one eighth of its initial undecayed nuclei remaining.
值得注意
当一个定义与可测量或可观察的现象连接起来时，科学才真正容易记住。