July 8‚ 2013 The Half Life of a Radioisotope By Jeremiah Stoddard Abstract: The half-life of a radioisotope is the time required for half the atoms in a given sample to undergo radioactive‚ or nuclear‚ decay. Half-life is given the symbol t1/2.Different radioisotopes have different half-lives. The amount of radioactive isotope remaining can be calculated using the equation‚ ln [ (A)0 / (A) t1/2 ] = kt1/2 ‚ or‚ rearranged: ln 2 = kt1/2. A sample data set was provided due to safety concerns
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Radioactive Isotopes An isotope is one of two or more atoms with the same number of protons‚ and position in the periodic table‚ but different number of neutrons and physical properties. Isotopes have an unstable nucleus that decay suddenly by a release of nuclear electrons and radiation. This essay will be discussing one of the applications and uses of the radioactive isotopes‚ and it will also state one problem that radioactive isotopes can address. The radiation characteristically
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Radioactive Isotopes Radioactive isotopes are any of several species of the same chemical element with different masses whose nuclei are unstable and dissipate excess energy by spontaneously emitting radiation in the form of alpha‚ beta‚ and gamma rays. Every chemical element has one or more radioactive isotopes. More than 1‚000 radioactive isotopes of the various elements are known.. Approximately 50 of the isotopes are found in nature; the rest are produced artificially as the direct products
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8.01- Half-life and radioactive decay Shelby Wolf Uranium 1) Where is this substance most likely found and how abundant is it? It is found within the Earth’s crust‚ also found in rock‚ soil‚ rivers‚ and oceans. It is believed to be available for at least the next 85 years‚ U-238: 99.27 U-235: .72 U-234: 0.0055 2) What type of decay does this substance undergo and how harmful can it be to those exposed? The U-235 undergoes nuclear fission
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pollution control‚ and archeology. Used to treat cancerous tumors…to measure correct patient dosages of radioactive pharmaceuticals…to measure and control the liquid flow in oil pipelines…to tell researchers whether oil wells are plugged by sand…and to ensure the right fill level for packages of food‚ drugs‚ and other products. (The products in these packages do not become radioactive.) Used in research in red blood cell survival studies. Cobalt-57 Cobalt-60 Copper-67 Used as
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to be non-active may possess radioactive isotopes having almost identical chemical properties [1]. Radioisotopes are atoms with a nucleus that is seeking a more stable configuration by emitting radiation. Scientists have learned that more radioisotopes could be created by subjecting certain elements to radiation inside a nuclear reactor or bombarding them using a particle accelerator [2]. Nuclear medicine uses very small amounts of radioactive isotopes‚ or tracers‚ to diagnose and
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Determining Half-Life Emily Silvi March 4‚ 2013 Lab Partner: Meghan Imbalzano Presented to Madelyn Prosachik [pic] Simulated Determination of a Half-Life. |Years |Atoms Decayed |Atoms Remaining |Half-Life | |0 |0 |190 | | |1
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Half Life Experiment My hypothesis would be that after each shaking about half of the remaining candies would be logo-up and half of them logo-down. That’s why the shaking represents a "half-life". half-life || total time (sec) || # of undecayed atoms || # of decayed atoms 0 0 100 0 1 5 65 35 2 10 51
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ISOTOPES History of the term: In the bottom right corner of JJ Thomson’s photographic plate are the separate impact marks for the two isotopes of neon: neon-20 and neon-22. The term isotope was coined in 1913 by Margaret Todd‚ a Scottish physician‚ during a conversation with Frederick Soddy (to whom she was distantly related by marriage).[4] Soddy‚ a chemist at Glasgow University‚ explained that it appeared from his investigations as if each position in the periodic table was occupied by multiple
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The Half-Life of a Radioisotope CHM 152 Abstract: The half-life of an unknown radioactive isotope was investigated. The activity of the samples through use of a Geiger-Muller counter. The activity was measured for approximately five minutes per sample‚ and a half-life was calculated by the unknown. The results were calculated to indicate a half-life of 6.65 days of the unknown radioisotope. Introduction: The half-life of a radioisotope is defined as the amount of time necessary for one-half
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