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Reminds me of my ingot of invar. Every fee years I try to think of something to do with it, but still haven’t come up with anything.
GOD DAMNIT! Who touched my Uranium-235?? I left it RIGHT HERE where this lead is.
Hey where did my thorium 231 go?
Just eat the lead to make all the worries disappear
So I ran the numbers. U-235 decays into Pb-207, which means about 12% of its mass is radiated away in alpha decay. Which sounds like a fuckton.
Also, it’ll mean that that chunk of lead will be a touch heavier, at 13.2 lbs
The Maths:
U-235 decays into Pb-207. To three significant digits, 207/235 = 0.881, equivalent to 88.1%, meaning 11.9% is radiated away.
88.1% of 15 lbs = 13.2 lbs.And that’s ignoring spontaneous fission which is probably happening to some extent to some of the isotopes
Put that chunk of uranium on a scale and you have a 700 milion year calendar
Woahhh. That’s heavy maaannn.
So a chunk of lead today could have been pre-cambrian uranium?
u-235 has a half life of 704 million years. only half of it would have decayed.
