"Isotope" Essays and Research Papers

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Cobalt History

found as a solid and is most commonly found as a byproduct to mining iron and nickel, and is only classified as cobalt for about 40 days after being harvested. Even more information about this fascinating element would be that it is an artificial isotope, is an important gamma ray source, and is extensively used as a tracer and a radio therapeutic agent. Other uses that are more close to home if you will would be that it can be used for high-speed, heavy-duty, high temperature cutting tools, and for...

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Periodic Table and Technetium

discovered at the University of Palermo, in Italy. Bombarding molybdenum atoms with deuterons creates Technetium. Technetium has 34 isotopes. All of them are radioactive but none of them are stable. Technetium-97, technetium-98 and technetium-99 are the most stable isotopes of Technetium. They have half-lives of more than a million years. Technetium-99m is the most useful isotope of technetium. “Technetium-99 is found in the radioactive wastes from defense-related government facilities, nuclear reactor...

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Asignacion Lesson 8

That happens because of isotopes. An atom that is missing a neutron or has an extra neutron is called an isotope. They are still the same element; however, they are just a little different from every other atom of the same element. Most of the carbon atoms in the universe are Carbon-12, with 6 neutrons. A small percentage of carbon atoms are Carbon-13, with 7 neutrons, and an even smaller percentage are Carbon-14 and have 8 neutrons. Carbon-13 and Carbon-14 are isotopes of carbon. Atomic mass...

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Chem 11 Section Assignment 3.1

will be required. 1. Element "E" (not a real symbol for an element), has three naturally occurring isotopes: 60% 228E, 25.0% 222E, and 15.0% 232E. Use this information to determine the atomic mass of element "E". Atomic Mass = (0.60 x 228g/mol) + (0.25 x 222g/mol) + (0.15 x 232g/mol) = 227.1g/mol (Actinium) 2. Calculate the approximate percent abundance of gallium's isotopes (69Ga, 71Ga) in a sample of gallium metal. Ga atomic mass is 69.72g/mol. Let x be the % of 69Ga as...

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Candium Lab

Chemistry Block H Mr. Neil Chipman Calculating the Atomic Mass for Different Candium Isotopes Objective: In this experiment I will be discovering the atomic weight of Candium isotopes. By doing this experiment, it helps us to know how to calculate the relative abundance and atomic mass of each Candium isotopes without having to use the spectrometer. This lab will achieve my understanding of isotopes and why it has different masses but same number of protons due to different numbers of neutrons...

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nature, rather than being man made. Outside the laboratory, francium is very rare, with trace amounts found in uranium and thorium ores, where the isotope francium-223 continually forms and decays. As little as 20-30g exist at any given time throughout the Earth’s crust; the other isotopes are synthetic. The largest amount ever collected of any isotope was a cluster of about 10,000 atoms (of francium-210) created as an extremely cold gas at Stony Brook in 1997. Francium can be made artificially...

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Radiometric Dating

the amount of each parent and daughter isotope in the material. By finding these values they work out how old the rock or object is. Radiometric dating is a very accurate way to date the age of an object if the object was in a closed system. Also if the number of parent and daughter isotopes are known from its creation. However it is very difficult for an object to be in an isolated system for many years. It is also impossible to know the number of each isotope that is present in the rock when it was...

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Half Life Lab

unstable nuclei and how it can be measured; that the exact time that a certain nucleus will decay cannot be predicted; and that it takes a very large number of nuclei to find the rate of decay. Purpose To stimulate the transformation of a radioactive isotope with M&Ms over time and to graph the data and relate it to radioactive decay and half-lives. Materials and Safety Materials * 200 pieces of M&Ms (trademark only) * Shoe Box * Pen/Pencil * Paper Towel Safety- No safety...

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Nuclear Power and Radioisotopes

peX` Athavan Balendran Mrs. Phillips Chemistry B4 23 March 2012 Radioisotopes Radioisotopes are considered as a double-edged sword. They can be the greatest innovation in science, or the cause of death. Radioisotopes are isotopes that are produced artificially or naturally through the process of synthesis and separation. These combinations of protons and neutrons are unstable and give off a radioactive wave. Radioisotopes can be used for many different functions such as an atomic bomb or to...

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elements change at regular rates, into non-radioactive elements. The older a rock is the larger the number of elements. The age of the rock is found by measuring when the element decays. Radio isotopes which are used to calculate the age of rocks have very long half-lifes, one of the most commonly used isotopes for this is uranium 238. Uranium 238: Half life = 4.5 billion years Uranium-238 has half the atoms in any sample will decay in that amount of time. Uranium-238 decays by alpha emission into...

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