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CATEGORY (click to search)	Subcategories of {AJ:07:f:03}: Matter: Physics: Atomic nucleus: Radioactive isotope
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AJ:07:f:03	Matter: Physics: Atomic nucleus: Radioactive isotope
	515 lifetime 163 heavy 50 ionium 31 heauy 21 heauie 18 helion 14 heavie 12 parents 12 thoron 11 heavier