will be medical imaging (X rays) and radiation therapy which are in the emphasis of nuclear medicine. Also nuclear chemistry has some other methods that deals with nuclear medicine called analytic methods which are using radioactive isotopes for biological tracers and using isotopes for dilution. Radiation can have beneficial and harmful effects towards organisms‚ and it normally be applied in the form of dosages. It is said that as the dosages increase the greater the effect the radiation has upon
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the world’s most widely used medical nuclear isotope for diagnostic imaging. In its name‚ the ‘m’ of 99m describes indicates the metastability of the particular radionuclide. This metastability is the ability for a certain energy state of the radionuclide to exist indefinitely until‚ whether spontaneously or because of outside factors‚ it changes to the much more stable Tc-99‚ with a half-life of over 210‚000 years. Technetium-99m is used as a radioactive tracer which can be taken orally or injected
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How Are They Made?What are isotopes?The isotopes of an element are all the atoms that have in their nucleus the number of protons (atomic number) corresponding to the chemical behavior of that element. However‚ the isotopes of a single element vary in the number of neutrons in their nuclei. Since they still have the same number of protons‚ all these isotopes of an element have identical chemical behavior. But since they have different numbers of neutrons‚ these isotopes of the same element may have
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Mark Scheme (Results) Summer 2012 International GCSE Chemistry (4CH0) Paper 1C Science Double Award (4SC0) Paper 1C Edexcel Level 1/Level 2 Certificate Chemistry (KCH0) Paper 1C Science (Double Award) (KSC0) Paper 1C Edexcel and BTEC Qualifications Edexcel and BTEC qualifications come from Pearson‚ the world’s leading learning company. We provide a wide range of qualifications including academic‚ vocational‚ occupational and specific programmes for employers. For further information‚
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Carbon-14 Dating: an Invaluable Yardstick in the Chronology of Humans Archeologists use many methods to analyze data from the past. One scientific tool they use is to analyze the radioactive decay of chemical elements found in plant and animal remains‚ pottery‚ and even in rocks. Radiocarbon dating‚ also known as carbon-14 dating‚ has been one of the most important radioisotope dating methods used. This scientific tool‚ which was first developed by Willard F. Libby in the late 1940s‚ has significantly
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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 help in the field of medicine. They are very important and without them
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2014 Radio Isotopic Dating An isotope is an atom of the same element with different number of neutrons. Sometimes the isotope is unstable which causes the isotope to change into a different atom over a certain period of time. By comparing the ratio of the original atom to the product that were in the beginning sample with the ratio of the products at the present time‚ scientists are able to determine the age of a substance. Radio isotopic dating‚ or radioactive dating is the calculation of a substance
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Most elements have isotopes. For stable isotopes‚ an interesting plot arises when the number of neutrons is plotted versus the number of protons. Because the plot shows only the stable isotopes‚ this graph is often called the Nuclear Belt of Stability. The plot indicates that lighter nuclides (isotopes) are most stable when the neutron/proton ratio is 1/1. This is the case with any nucleus that has up to 20 protons. As the atomic number increases beyond 20‚ a different trend becomes apparent. In
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BSC 1020 – Homework Unit B The Molecules of Life This homework is worth 25 points of the 900 points available in the course. Please use the book‚ PPT lecture handouts‚ and internet to answer the following six questions: Question 1 (8 points) Mr. Tony‚ a biology teacher‚ gives his student Ziad four samples and tells him they are lysine (an amino acid)‚ lactose (a disaccharide)‚ insulin (a protein hormone)‚ and RNA. The samples are in test tubes marked 1‚ 2‚ 3‚ and 4‚ but Ziad is
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undergo radioactive‚ or nuclear decay. The amount of radioactive isotope remaining can be calculated using the equation‚ t1/2 = .693/K. A sample data set was provided due to safety concerns. Using the data set‚ a half-life of 14.27days -1 was calculated using graphical linear regression analysis. Introduction: The purpose of this experiment is to determine the half-life of an unknown radioisotope. Half-life is defined as the time it takes for one half of the atoms in in a radioactive sample to
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