The assertion could be correct if the isochron plot had been level of parent

Just just How may be the life that is half of element determined? For something that takes 60 billion years to partially decay, exactly exactly how can be a precise way of measuring the decay price determined in some hours?

Half-life assessments do not always just simply take only “several hours. ” Davis et al. (1977) measured the decay price of 87 Rb (48.9 ± 0.4 billion years) by counting the accumulation of 87 Sr over a period of nineteen years.

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