Equation 9 · Part 1 · Radioactive Clocks: How Nuclear Physics Gave Evolution Its Time
Symbol N_238
What this part means
38 is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.
Its job in the formula
38 is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.
Full expression→Symbol N_238→Article meaning
The passage around this formula
where and are the radiogenic lead atoms accumulated from each chain and , are the surviving parent uranium atoms. Plotting these two ratios against each other traces a curve, the concordia, on which a grain that has behaved as a closed system since crystallization must fall; a grain that has lost lead at some later date instead falls off the curve along…
Learn the underlying idea
A subscript is a label attached below a symbol. It often selects a time step, component, category, or member of a sequence.
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Sources cited in the surrounding passage
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