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The isotope U-238 has a halflife of 4.5 billion years, roughly the current age of the earth. As the sun is expected to consume the earth in about 6 billion years from now, less than 1.5 halflives will have passed by then. Therefore uranium will remain in the environment as long as earth exists, although at slowly decreasing levels.

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10y ago
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15y ago

Uranium forms almost instantaneously in supernova explosions.

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11y ago

A million billion years

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Q: How long does it take to make uranium?
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Related questions

How long does it take to make uranium for a nuclear bomb?

Depending on the size and type of the bomb and also on the enrichment installation available.


How long does it take uranium to become a fossil fuel?

Uranium is not a fossil fuel and cannot be a fossil fuel.


How many atoms of uranium does it take to make plutonium?

In the reaction238U + n-------239U-------239Np + e--------239Pu + eone atom of uranium become one atom of plutonium.


When reacting does uranium give or take electrons?

Uranium is a donor of electrons.


How do you make a stick of uranium?

- By melting of metallic uranium. - By sticking sintered uranium dioxide pellets


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.


How long does it take to make crayons?

how long does it take to make a crayons


What is a uranium pellet?

You are orobably thinking of the small cylinders which make up the fuel rods. These are 10mm diameter and about 10mm long, and are packed end to end inside the zircaloy sheath to make a fuel rod. The material is uranium dioxide with the uranium enriched to about 5% U-235.


How long will it take for all the uranium collected to be converted to thorium?

Billion of years; each isotope has a different half life.


How long does it take a 5-gram sample of uranium- 235 to decay to a mass of 2.5 grams?

One Half-Life :-)


How long does it take a 100 gram sample of uranium 235 to decay to a mass of 50 gram?

700 million years


What is one less interesting fact about uranium?

Uranium is not used to make knives !