Discovered
1945Density
7.3 g/cm3Melts
1042 °C
- 1907 °F
- 1315 °K
Boils
3000 °C
- 5432 °F
- 3273 °K
Contributed by collector no. 2
A watch hand with a coating of glow-in-the-dark Promethium paint. The chemistry of this paint is hard to research, but it's probably a tiny percentage of Promethium compounds in a fluorescent paint which turns radiation into visible light.
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