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How many years would it take for half of the atoms in uranium to change into lead?
Wiki User
∙ 12y ago
The half-life of 214Bi is 19.7 minutes. However, it has two decay modes, neither of which leads directly to lead; that complicates things. One of the decay modes leads to 214Po, which then quickly (half-life 0.0016 seconds) decays to 210Pb. The other one leads to 210Tl, which has a half-life of 1.3 minutes and also decays to 210Pb. So: Half of the 214Bi will be gone in 19.7 minutes; a bit after that half the sample will be 210Pb.
Wiki User
∙ 14y ago
Wiki User
∙ 14y agoThe half-life (time necessary for the disintegration of 50 % uranium atoms in lead stable isotopes) for uranium:
Uranium 235: 7,038.108 years
Uranium 238: 4,468.109 years
James McCain
James McCain
James McCain
Wiki User
∙ 12y agoThere is a simple equation to solve this:
X=uranium, H=molecules, T=temperature
Wiki User
∙ 13y agoOne half life.
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What is the difference between the suns nuclear reactions and man made ones?
The sun's nuclear reactions are based on fusion of atoms (hydrogen atoms are fused together to form helium or lithium mainly) whereas earth-bound nuclear reactions are based on fission (uranium atoms are smashed apart to form (often radioactive) fragments and energy) There has been research on earth-bound nuclear fusion for many years (JET project in the UK) and ITER, but there is still a long way to go before we can mimic the sun!
Is The currently accepted age of Earth is approximately 4.5 million years?
Clair Cameron Patterson was an American geochemist who estimated the age of the earth as 4. 55 years old. He developed the uranium-lead dating method into lead-lead dating method.
Why does the shape of a constellation appear not to change?
The shapes do change, but only a little bit over thousands of years.
How old is a 10-year-old on Mars?
A year on Mars lasts 687 Earth days. Do a little math - 365/687=53%.53% of 10 is 5.3 years old or 5 years 109.5 days old.Sort of ...If you want to use Mars years, you should also use Mars days for your final answer.10 Earth years = 5.316886 Mars years.The Mars solar day is 1.027491 Earth solar days.Converting to Mars solar days, 0.316886 Mars years would be 217.7 Earth-days (not 109.5 days) or 211.9 Mars-daysSo in Martian years and days, someone who is exactly 10 Earth Years old would be 5 Mars-years, 212 Mars-days old.(remember the .3 in the 5.3 "years" is Mars-years, not Earth years so you have to multiply it by 687 Earth-days, not 365 Earth-days)
If a constant apparent speed of 1.54 km s by how many megaparsec would the separation between us and a galaxy change over the course of 2.0 billion years?
.00323 Megaparsec
If you start with 60 atoms of uranium - 238 how many remain after 4470000000 years?
30 atoms
How long can radioactivity be on uranium?
As long as there are any uranium atoms. Since U-238 has a half-life of over a billion years, that can be a long, long time.
What atoms make up uranium?
Uranium is a very heavy (dense) metal said to have formed in supernovae about 6.6 billion years ago.It is a radioactive element found in many rocks in the Earth's crust.
Is uranium sustainable?
Years after years uranium also will run out of the earth.
Does the absolute age of a rock change?
yes, it does actually because, radiometric dating determines the half life of the uranium in the rock. They can tell how old the uranium is because, all forms of uranium starts with 4.6 billion years of life. Meaning if the half life is 2.3 billion years that means the rock is about 2.3 billion years old
Why would uranium-238 not be useful in determining the age of a spear that is thought to be 5000 years old?
Uranium dating is useful for long periods of time - e.g. 109 years. For fossils is recommended the method with 12C.
Uranium-235 has a half life of?
The half-life is 700 million years !
When did atoms stabilize second phase change?
about 3 billion years after the Big Bang
How many years will it take for 10 g of radioactive uranium to decay into 5 g of radioactive uranium?
5,730 years
What is the half life of uranium 238 if 85.719 percent of any given amount remains after 1 billion years?
Natural uranium contain 0,7204 % uranium 235.
What uranium splits into?
Uranium 235 will naturally decay (with a half-life of 700 million years) into thorium 231. If it encounters a neutron, it can split into 2 or 3 smaller atoms; the exact atoms formed may vary.Uranium 235 will naturally decay (with a half-life of 700 million years) into thorium 231. If it encounters a neutron, it can split into 2 or 3 smaller atoms; the exact atoms formed may vary.Uranium 235 will naturally decay (with a half-life of 700 million years) into thorium 231. If it encounters a neutron, it can split into 2 or 3 smaller atoms; the exact atoms formed may vary.Uranium 235 will naturally decay (with a half-life of 700 million years) into thorium 231. If it encounters a neutron, it can split into 2 or 3 smaller atoms; the exact atoms formed may vary.
Why nuclear fission is not possible in naturally occurring uranium?
Fission in Uranium would take billions of years when its left to its own devices. Because of radioactive decay, it would either release alpha or beta radiation, or fission. The earth would have to be really old for that to maybe happen. Besides, Only less than 1% of Uranium is U-235, which is the only isotope of uranium that would fission, is found on earth.
