If it could gain one more electron, then chlorine would be iso-electronic with argon.

如果它能得到另一个电子，它就能和氩一样是电绝缘。

麻省理工公开课 - 固态化学导论课程节选

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。

麻省理工公开课 - 固态化学导论课程节选