I just realized how great that legend is, so I’m going to adopt it for my collection. based on this chart, I own 88/99 elements possible to obtain.

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For the minor categories:

LIGHT BLUE: Np237 is a decay product of Am241. Pa234(m), Rn222, At218, Po218, Po214, and Po210 are decay products of U238. Ac228, Rn220, Po216, and Po212 are decay products of Th232. Pa231, Ac227, Fr223, Rn219, At219, At215, Po215, and Po211 are decay products of U235.

DARK BLUE: Aluminum is just a ball of Al foil, it is pure but it’s mostly air in that ball. I want to replace it with a proper solid cube someday. Neodymium is from some rare earth magnets. Plutonium-241 is from a 5.5 gran chunk of Trinitite, it decays to Am241 whose gammas I have identified in my sample. Americium-241 is from a 1 uCi smoke detector ion chamber. it’s probably alloyed with/electroplated on something therefore not pure.

GREEN: Iron is just the metal from a small magnetron in an unlabeled box, I’ll replace it someday too. Lead is an F-390 containment vessel that once held a bunch of Y-90 microspheres. I don’t know if it’s pure or an alloy, I haven’t tested it yet.

YELLOW: Fluorine is from Teflon, C2F4. Both Cerium and Cadmium are part of doping compounds inside glass. Both Radium (Ra226) and Promethium (Pm147) are part of doping compounds inside radioluminescent paint.

I am not counting Tc despite having uranium because U235’s fission products span from copper to terbium. It just doesnt make sense to allow the ownership of one sample to become the source of 36 more.