I'm going to start working on nuclear fission and how to split uranium atoms
whoops, gotta run to sweden to escape the nazis
Now in Sweden
By bombarding uranium with a whole bunch of neutrons, we can split it since it has low nuclear surface tension.
But what about the radium that remained, that's way too big to be a fission product
The chemical that remained after the bombardment isn't radium but barium; it's small enough to be a product of uranium's split
Cool, this means that nuclear fission is possible and explosives can be made from it! No one's going to remember your part in this though since you're a Jewish woman in the time of the Holocaust, hopefully you're cool with that.