Thorium dating


26-Sep-2019 02:57

thorium dating-29

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Thorium has a characteristic terrestrial isotopic composition, with atomic weight 232.0377(4).

It is one of only four radioactive elements (along with bismuth, protactinium and uranium) that occur in large enough quantities on Earth for a standard atomic weight to be determined.

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Aluminium's is 75.2 GPa; copper's 137.8 GPa; and mild steel's is 160–169 GPa.Th is a constant during the period when the sediment layer was formed, that the sediment did not already contain thorium before contributions from the decay of uranium, and that the thorium cannot migrate within the sediment layer.



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