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600 grams of uranium after 3 half lives how many grams would there be?
Wiki User
∙ 16y ago
1 ounce and three large testes
Wiki User
∙ 16y ago
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If you were to have 80 grams of uranium how many grams would be present at the end of the second half time?
After the second half-life of uranium, half of the original amount will remain. Therefore, if you start with 80 grams of uranium, after one half-life you would have 40 grams remaining, and after the second half-life, you would have 20 grams.
What are the half lives for uranium-235 and uranium-238?
703, 800,000
How come elements below uranium have equally short half-lives as the elements above uranium?
This affirmation is not correct; the half lives are different.
How much uranium is left if a solid piece for one half life?
Half life is the time taken for half the atoms to decay. Whatever mass you start with, if it is a sample consisting of one pure uranium isotope, you will have half that mass of uranium after one half life. The piece of metal will not weigh half of the original mass, because the decay products will be there. In practice, a piece of uranium usually consists of a mixture of isotopes with different half lives.
Does nuclear fission take place in an uranium bar?
Yes, with a rather unimportant qualification. There are isotopes of uranium that do not undergo fission, but it is unlikely a bar would be made from any of them because they have short half lives and are expensive to produce.
How much uranium is left if a solid piece exists for one half-life?
Half life is the time taken for half the atoms to decay. Whatever mass you start with, if it is a sample consisting of one pure uranium isotope, you will have half that mass of uranium after one half life. The piece of metal will not weigh half of the original mass, because the decay products will be there. In practice, a piece of uranium usually consists of a mixture of isotopes with different half lives.
A specimen of uranium has half-life of 4.5 billion years How many years will it take one gram of this uranium to become 0.25 grams?
Approx. 9 billion years.
How long does it take a 5-gram sample of uranium- 235 to decay to a mass of 2.5 grams?
One Half-Life :-)
A 100 gram sample of a radioactive element is present at 9 a.m. on Monday and only 25 grams of the element can be detected at 9 a.m. on Friday. What is the half-life of the source?
The half-life is 2 days. You start with 100 grams. In one half life, you will lose 50 grams and have 50 grams remaining. In a second half-life, you will lose 25 of the 50 grams and have 25 grams left. You will have lost 75 grams of a 100 gram sample of radioactive material and have only 25 grams of it left after two half-lives. That means there are two half-lives from 9 a.m. Monday to 9 a.m. Friday. That's 4 days for 2 half-lives, or 2 days for one half-life.
What is the problem with disposing of radioactive wastes is that they have a long what?
Radioactive substances have half-lives. This is because the isotope constantly is changing from the radioactive isotope to a daughter element. For example, eventually, when uranium's radioactivity is gone, it becomes lead. After one half life of a radioactive substance, only 50% of that substance is still radioactive. Therefore, after one half-life, a piece of uranium is 50% lead and therefore %50 less radioactive. After another half-life, it has 25% of the original radioactivity, and 75% of the original uranium has become lead. This is the problem with radioactive wastes. It takes many years just for one half lives for some substances, such as uranium. Because radioactivity is harmful, those substances have to be stored until they are no longer radioactive. So, in short, the problem with disposing of radioactive wastes is that they have long half-lives. (although this is not true with ALL substances because some have short half-lives, but, in general, radioactive substances have long half-lives.
What is the age of a meteor with half being uranium 238 half being uranium 206?
There is no isotope of Uranium 206 - Uranium 217 is the lightest.
How many grams would an half ounce be?
14.17 grams
