Those are the lanthanides on top and the actinides on the bottom.

顶部的元素，底部的锕元素。

They are actually kind of crazy actinides are, uh, they contain all the elements that we make nuclear weapons out of.

它们实际上疯狂的锕元素，它们包含了我们造核武器所需要的所有元素。

There are 15 and together with the actinides below them.

这里有15个，加上它们下方的锕元素。

And below of course, in the little island of the lanthanides and actinides, your f-orbitals: 4f and 5f.

，下方，元素和锕元素的小岛上， 你的 f 轨道：4f 和 5f。

Mendeleev didn't know about the these series the lanthanides and actinides he put protactinium here

门捷列夫不知道元素和锕元素这些列，他把镤放这里了。

It's also probably the only other actinide which has possibly routinely got its way into households which is that it's also used in metal detectors.

它可能也唯一一种常见于家庭的锕元素，因为它也被用于金属探测器。