I know there is around $10^{80}$ atoms in the observable universe, but is there any estimate the amount of lead in the universe (within a couple magnitudes of $10$)?
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1$\begingroup$ Are you worried about being poisoned? $\endgroup$– Ron MaimonCommented Sep 24, 2011 at 2:08
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$\begingroup$ No, actually, I am wondering whether the amount of lead is merely small (less than 1 / 10^3) or vanishingly rare (less than 1 / 10^60) $\endgroup$– donnytonCommented Sep 24, 2011 at 2:16
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1$\begingroup$ The estimated fraction of lead atoms in the universe is $6\cdot10^{-11}$. $\endgroup$– mmcCommented Sep 24, 2011 at 2:59
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$\begingroup$ @mmc: why not post as an answer? Also: does this belong on Astronomy? $\endgroup$– David ZCommented Sep 24, 2011 at 3:45
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1$\begingroup$ @mmc: fair enough, I understand the reluctance to post a very short answer... but I think that if you have an answer, as long as it really does answer the question, even if it is very short, it's better to post it as an answer than as a comment. $\endgroup$– David ZCommented Sep 24, 2011 at 4:15
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The estimated fraction of lead atoms in the universe is $6 \times 10^{−11}$.
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1$\begingroup$ Alpha is only giving molar abundance, not atomic abundance. Link rot? $\endgroup$– MarkCommented Oct 24, 2017 at 22:04