If they are found on the same place, it is iso-topos. These are called isotopes.

如果是在同一个位置，按照国际惯例，它们被叫做同位素。

youdao

If they are found on the same place, it is iso-topos. These are called isotopes.

如果是在同一个位置，按照国际惯例，它们被叫做同位素。

youdao