- Location
- Switzerland
- Name
- Matt
- Start Date
- Jan 3, 2021
- End Date
- Jan 3, 2021
At, Bi, Po, Pa, Ra, Rd, Th, U - all of these elements sport a radioactive isotope with 217 protons and neutrons in their respective nuclei ...
Following that lead, I also found this:
Could be worse ...
M.
Following that lead, I also found this:
Could be worse ...
M.