Ionium
Ionium is a term that has been used historically to refer to an isotope of thorium, specifically thorium-230. Thorium-230 is a radioactive isotope with a half-life of approximately 75,380 years. It is a member of the uranium decay series, specifically the decay product of uranium-234.
The term "ionium" was coined in the early 20th century when this isotope was first identified. However,
Thorium-230 is found naturally in uranium ores and is also produced in nuclear reactors. Due to its