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Uranium 235 halflife: 7,038.108 years

Uranium 238 halflife: 4,468.109 years

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Q: In years what is the half life of uranium 235 and 238?
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Related questions

What is the half-life of uranium 235?

Uranium 235 half life is: 7,038.108 years.


How many years is a half life for an isotope uranium-235?

The half-life of uranium-235 is 703 800 000 years.


Uranium-235 has a half life of?

Uranium 235 has a half-life of 700 million years.


A uranium-235 sample starts with 200 atoms and 700 million years later there are 100 atoms. What is the half-life of the uranium-235?

The half-life is 700 million years !


A uranium-235 sample starts with 200 atoms and 700 million years later there are 100 atoms. What is the half-life of uranium-235?

The half-life is 700 million years !


Examples of radioisotope and their half life?

The half-life of uranium-238 is about 4.47 billion years and that of uranium-235 is 704 million years.


What is the half life of power grade uranium?

If you think to uranium 235 the half life is 703 800 000 years.


What is the half life uranium-235?

700 million years


A uranium-235 sample starts with 200 atoms and 700 million years later there are 100 atoms What is the half-life of uranium-235?

700 million years


What is the half-life of U-235?

It takes approximately 700 million years for uranium 235 to decay to half of its original form.


Uranium 235 has a half life of 700 million years. How long does it take a 5 gram sample of uranium 235 to decay to a mass of 2.5grams?

700 million years


The half life of uranium 235 is 713 million years Suppose a rock originally had 26 grams of uranium 235 A geologist had the rock tested and found that it now has only 3.25 grams of uranium 235?

2.1 billion years old


What is the half life of uranium?

== == Naturally occurring uranium is a mixture of three isotopes. The most abundant (greater than 99%) and most stable is uranium-238 (half-life 4.5 x 109 years); also present are uranium-235 (half-life 7 x 108 years) and uranium-234 (half-life 2.5 x 105 years). Different isotopes have different half-lives. The most stable isotope of uranium, 238U, has a half-life of about 4.5 billion years.


Uranium-235 has a half-life of 700 million years. How long does it take a 5-gram sample of Uranium-235 to decay to a mass of 2.5 grams?

700 million years


The half life of uranium 235 is 700 million years After 1.4 billion or 1 400 million years what fraction of the original amount of uranium 235 remains?

50 % from the initial quantity


Uranium-235 has a half-life of 700 million years. how long does it take a 100-gram sample of uranium-235 to decay to a mass of 50 grams?

700 million (more exactly 703,8.106) years


Uranium-235 has a half-life of 700 million years How long does it take a 100-gram sample of Uranium-235 to decay to a mass of 50 grams?

700 million (more exactly 703,8.106) years


The half life of uranium 235 is 700 million years After 14 billion or 1400 million years what fraction of the original amount of uranium 235 remains?

Uranium 235, with a half-life of 700 million years1, will decay to 0.95x10-6 of its original value after 14 billion years, and to 0.25 of its original value after 1400 million years. AT = A0 2(-T/H) --------------------------------------------------------------------------------------------- 1The actual half-life of 235U92 is 704 million years. The answer given used 700, not 704.


What does Half-Life of Uranium 235 mean?

Uranium is a radioactive element and conteneously disintegrate into smaller element, that time in which 1g of uranium becomes half g is known as half life period of uranium.


Uranium-235 has a half life of about 7000 million years if 1kg of U-235 is put on a shelf in a laboratory how much of it will be left about 700 million years?

Uranium 235 has a half life of about 7000 million years if 1 kg of U235 is put on a shelf in a laboratory and left for 700 million years 900 g would remain. The bigger question would be how the shelf and laboratory survived that long.


Uranium-235 with a half-life of 713000000 years decays to lead-207 If a rock sample is determined to have one-quarter of the uranium-235 content it had when it formed the age of the rock sample?

If a rock sample is determined to have one-quarter of the uranium-235 content it had when it formed the age of the rock sample is 1.426 billion years.


Uranium 235 has a half life of about 700 million years if 1 kg of U 235 is put on a shelf in a laboratory how much of it will be left after 700 million years?

A half life pertains to the time it takes for exactly half of a substance to disappear. So, if U235 has a half life of 700 million years, it will take 700 million years for half of it to decay. That would leave .5kg or 500g.


Is uranium natural or man-made?

In nature, uranium is found as uranium-238 (99.2742%), uranium-235 (0.7204%), and a very small amount of uranium-234 (0.0054%). Uranium decays slowly by emitting an alpha particle. The half-life of uranium-238 is about 4.47 billion years and that of uranium-235 is 704 million years,[4] making them useful in dating the age of the Earth.


How long does it take for Uranium to decay into lead?

The 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


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.