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The purest uranium is obtained after a long series of chemical processes. Ex.: grinding, dissolving, filtering, ion exchange separation, solvent extraction, etc.
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∙ 12y ago
Wiki User
∙ 13y agosample must contain Uranium-235.e...
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A uranium235 sample starts with 200 atoms and 700 million years later there are 100 atoms What is the halflife of uranium235?
700 milliion years. The definition of half-life is the period of time during which one-half of the atoms of an element undergo decay into other elements.
Who measures the ratio of unstable to stable atoms in a rock sample to estimate the age of the fossil it contains?
Absolute dating
What is the measuring of the ratio of unstable and stable atoms in a rock sample to determine the age of the fossil it contains?
Radiometric dating.
What is the problematic about the potassium argon method of radiometric dating?
Argon is a gas that may leak from a sample and provide inaccurate data
Example problems of carbon dating?
The benefits of carbon dating is that it can give a guide as to the age of an artifact or fossil. Several problems exist with carbon dating. First, it only goes back so far. After a while, there is not enough radioactive carbon for the machinery to measure. Second, a sample may be contaminated. If a person picked it up with his bare hands, some of the carbon from his skin may have mixed with the sample. Third, if you want to know how long ago a cave was first occupied, you may miss the mark completely. People may have used the same garbage dump for over a million years.
To perform Uranium-235 dating on a sample what must be true?
The sample must contain Uranium-235.
A uranium235 sample starts with 200 atoms and 700 million years later there are 100 atoms What is the halflife of uranium235?
700 milliion years. The definition of half-life is the period of time during which one-half of the atoms of an element undergo decay into other elements.
What is one bad use of uranium235?
can cause lung cancer
What uses the ratio of parent to daughter material found in a sample to find the sample's age?
rudametric dating
What must be true for radioactive dating to be possible with a certain sample?
The sample must contain radioactive elements.
Why do you need to perform each of the tests on a known sample as well as on your unknown sample?
it is need so as a control.
How does the beginning sample size affect the accuracy of half-life dating?
A big sample is more statistically significant.
What is used to determine the absolute age of a sample?
Carbon dating. Google it
What is true about the fission of uranium235?
The reaction produces more neutrons than were needed to start it.
How does carbon dating work ma?
Carbon dating works by measuring the amount of radioactive carbon-14 in a sample. Carbon-14 is present in all living organisms and decays at a known rate after death. By comparing the amount of carbon-14 remaining in a sample to the amount in living organisms, scientists can determine the sample's age.
Why is now mass spectroscopy used instead of radiocarbon dating?
Mass spectrometry has not replaced radiocarbon dating, it is used as a better way to measure the amount of carbon-14 in the sample that permits smaller sample sizes and improved accuracy.
Why is it important to perform tests on a control urine sample not containing any chemical substance?
It is important to perform tests on a control urine sample not containing any chemical substances, a test result on a known quality can assist you in finding the unknown qualities of a urinary sample containing chemical substances. It also can validate any positive results you get with your test sample.
