People can get cancer from low doses of ionizing radiation, the kind released in a nuclear accident.

VOA: special.2011.03.16

So, which orbital would we take an electron out of if we were ionizing this atom here?

那么，如果我们要电离这个原子,应该拿走那个轨道上的电子？

麻省理工公开课 - 化学原理课程节选