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Protactinium!
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protactinium (Pa), radioactive chemical element of the actinoid series of the periodic table, rarer than radium; its atomic number is 91. It occurs in all uranium ores to the extent of 0.34 part per million of uranium. #fblock #allinfobits #periodictable #innertransitionmetals #actinides
#protactinium #tobernite #nuclearwaste #protactiniumresearch #Geigercounters
#protactinium #tobernite #nuclearwaste #protactiniumresearch #Geigercounters
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