what is the half-life of a radioactive isotope
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- The rate of. decay is a fixed rate called a half-life. The half-life of a radioactive isotope refers to the amount of time. required for half of a quantity of a radioactive isotope to decay. Carbon-14 has a half-life of 5,730 years, which means that if. you take one gram of carbon-14, half of it will decay in 5,730. years. Different isotopes have different half-lives.
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- The rate of decay of a radioactive isotope is described by itshalf-life. Check that the Half-life is set to 20 seconds, and selectTheoretical decay from the second dropdown menu. Check that the initialNumber of atoms is 128. (To quickly set a slider to a particular value, typethe value in the field to the right of the slider and press Enter .) Click Play .2.
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- Origin of LORETTE. French, from Notre Dame de Lorette, section of Paris. This word doesn't usually appear in our free dictionary, but the definition from our premium Unabridged Dictionary is offered here on a limited basis.Note that some information is displayed differently in the Unabridged.his word doesn't usually appear in our free dictionary, but the definition from our premium Unabridged Dictionary is offered here on a limited basis.
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Radioactivity The half-life of a radioactive isotope is the time after which, on average, half of the original material will have decayed. After two half-lives, half of that will have decayed again and a quarter of the original material will remain, and so on.
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- The rate at which a radioactive isotope decays is measured in half-life. The term half-life is defined as the time it takes for one-half of the atoms of a radioactive material to disintegrate. Half-lives for various radioisotopes can range from a few microseconds to billions of years. See the table below for a list of radioisotopes and each of unique their half-lives. Radioisotope.
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Radiation Measurement Atoms of the same element with differing atomic weights are called isotopes. Radioactive decay is a spontaneous process in which an isotope (the parent) loses particles from its nucleus to form an isotope of a new element (the daughter).nother important atomic clock used for dating purposes is based on the radioactive decay of the isotope carbon-14, which has a half-life of 5,730 years. Carbon-14 is produced continuously in the Earth's upper atmosphere as a result of the bombardment of nitrogen by neutrons from cosmic rays.
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It's Elemental Strontium carbonate is also used to make certain kinds of glass and is the base material for making most other strontium compounds. Strontium-90, a radioactive isotope of strontium, is a common product of nuclear explosions. It has a half-life of about 28.8 years and decays into yttrium-90 through beta decay. Strontium-90 is especially deadly since it has a relatively long half-life, is strongly radioactive and is absorbed by the body, where it accumulates in the skeletal system.
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- The half life of a radioactive isotope is the time taken for the number of radioactive atoms in the samp…le to decay to one half. Half lives vary hugely, from times like 10-21 seconds, to the very long, approaching the age of our solar system at 4.5x1012 years.
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- Polonium-210 has a half-life of 138.39 days. Polonium's most stable isotope, polonium-209, has a half-life of 102 years. It decays into lead -205 through alpha decay. Polonium-209 is available from Oak Ridge National Laboratory at the cost of about $3200 per microcurie.
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- Polonium-210 has a half-life of 138.39 days. Polonium's most stable isotope, polonium-209, has a half-life of 102 years. It decays into lead -205 through alpha decay.
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Chapter 4: The pig Pigs can be infected with a number of different roundworms. People who keep pigs can notice large roundworms, 25 - 40 cm long in the animals' dung. In pigs 2 to 5 months old the worms cause diarrhoea, weight loss and lung problems.
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(SOLVED PAPER If the half-life of a radioactive substance is 5 hour how long will it take for 87.5 percent of it to decay? If the half-life of a radioactive element is 4 days how long will it take for three fourths of a sample of the element to decay?   The half-life is 4 days. That means half of it will be gone in 4 days, and that leaves half of the original sample. In another 4 days, half of the remaining half will ha…ve decayed. And that will leave only 1/4 th of the original sample. That means 3/4 ths of the original sample will have decayed. In 8 days, three fourths of a sample of a radioactive element with a half-life of 4 days will have decayed. 9 people found this useful.
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- half-life. The time required for the activity of a given radioactive species to decrease to half of its initial value due to radioactive decay. The half-life is a characteristic property of each radioactive species and is independent of its amount or condition. The effective half-life of a given isotope is the time in which the quantity in the body will decrease to half as a result of both radioactive decay and biological elimination.
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- It occurs in nature as. iodide ions, and it is in this form that it is taken into our bodies. Of the fourteen major radioactive isotopes of iodine, only iodine-129 has a half-life sufficiently long to. warrant concern for Department of Energy (DOE) environmental management sites such as Hanford.
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Describe what is meant by the half life of a radioactive substance? The half-life is the amount of time it takes for half the radioactive substance to decay to a non-radioactive substance, usually Lead.
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- Graphs. It is possible to find out the half-life of a radioactive substance from a graph of the count rate against time. The graph shows the decay curve for a radioactive substance. The decay curve for a radioactive substance. The count rate drops from 80 to 40 counts a minute in two days, so the half-life is two days.
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Describe what is meant by the half life of a radioactive substance? Half-life: the time taken for a radioactive substance to decrease its radio activity to HALF its current amount (measured in Bequerels). Source(s): A level physics =D.
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Chalcogen All other polonium isotopes are short-lived except polonium-210 (half-life about 138 days), which is the most commonly used isotope. It is prepared by bombarding bismuth with neutrons in a nuclear reactor.olonium has 34 isotopes, more than any other element. All of these isotopes are radioactive. The most stable, polonium-209, has a half-life of about 103 years. Polonium-208 (half-life about 3 years) is the only other polonium isotope with a half-life over one year.
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- A - A half-life is defined as the amount of time required for one-half or 50% of the radioactive atoms to undergo a radioactive decay. This is also known as the “radioactive” or “physical” half-life. Every radioactive element has a specific half-life associated with it.
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Half-life The radioactive isotope cobalt-60, which is used for radiotherapy, has, for example, a half-life of 5.26 years. Thus after that interval, a sample originally containing 8 g of cobalt-60 would contain only 4 g of cobalt-60 and would emit only half as much radiation. After another interval of 5.26 years, the sample would contain only 2 g of cobalt-60.
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It's Elemental Radium's most stable isotope, radium-226, has a half-life of about 1600 years. It decays into radon -222 through alpha decay or into lead -212 by ejecting a carbon -14 nucleus. The Curie, a unit used to describe the activity of a radioactive substance, is based on radium-226.
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- There is a caveat to this calculation, however. The half-life of a free neutron is 15.4 minutes, but when the same neutron is bound in a compound nucleus such as oxygen-16, it is apparently as stable as the proton.he ultimate form of this temporal decay of matter is proton decay, whose extremely long half-life (unknown, but at least 35 powers of ten (10(35) years), is related to the extreme weakness of the gravitational force.
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- Half-lives range from fractions of a second to billions of years. For example, Carbon-14 (C-14), a naturally occurring radionuclide, has a half-life of 5,730 years. After this amount of time passes, half of the initial amount of C-14 is present. Therefore, if you began with two (2) curies of C-14, one-half of that amount, or one curie, would be present 5,730 years later.
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- The decay of radioactive elements occurs at a fixed rate. The half-life of a radioisotope is the time required for one half of the amount of unstable material to degrade into a more stable material. For example, a source will have an intensity of 100% when new. At one half-life, its intensity will be cut to 50% of the original intensity.
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half-life n the half-life of a radioactive isotope in a biologic organism, resulting from the combination of radioactive decay and biologic elimination. n the average time required for the decay of half the atoms in a given amount of a radioactive substance.
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- The isotope 237Np (half-life of 2.14 x 106years) is currently obtained in gram quantities as a by-product from nuclear reactors in the production of plutonium. Trace quantities of the element are actually found in nature due to transmutation reactions in uranium ores produced by the neutrons which are present.