percentage of 235U in it‚ a radioactive isotope that breaks down readily‚ releasing neutrons to break apart other atoms. Although the small amount of Uranium-235 produced only half a watt of energy‚ it was the proof of concept the team needed to proceed forward. It showed fission‚ the process of the atomic weapons to come. It broke the simple laws of chemistry‚ matter cannot be created nor destroy‚ as they shot a neutron (a neutrally charge nucleon)‚ at an unstable isotope of Uranium-235‚ splitting
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- - Name: - Teacher: - Scientists: Ernest Orlando Lawrence Andre-Marie Ampere Subject: Physics Class: 12A Due Date: 20th August 2012 Name: - Teacher: - Scientists: Ernest Orlando Lawrence Andre-Marie Ampere Subject: Physics Class: 12A Due Date: 20th August 2012 Physics ERT: Magnetism Physics ERT: Magnetism Table of Contents Table
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Curium is highly radioactive. As a metal‚ it is lustrous and silvery. It is malleable‚ chemically reactive and electropositive. Its surface rapidly oxidizes in air‚ gaining a thin film. Most compounds of trivalent curium are stable and faintly yellow or yellow-green. If absorbed in to the body‚ curium accumulates in the bones. Its radiation destroys red blood cell formation. Consequently‚ curium is considered very toxic. Large quantities of curium are now easily made in nuclear reactors. A nuclear
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Chernobyl‚ Ukraine Nuclear Power Plant Meltdown The accident at the Chernobyl Nuclear Power Plant in Ukrainian produced a plume of radioactive debris that drifted over parts of the western USSR‚ Eastern Europe‚ and Scandinavia. The accident‚ which occurred on April 26‚ 1986‚ was the worst nuclear power accident in history. Large areas of the Ukrainian‚ Belorussian‚ and Russian republics of the USSR were contaminated‚ resulting in the evacuation of roughly 200‚000 people. The accident raised
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Review Unit One – Biochemistry What is an isotope? Isotope - An isotope is all atoms of the same element that have the same number of protons‚ but they may have different numbers of neutrons in the nucleus. - This means that all atoms with the same atomic number can have different atomic masses. - Because they have the same number of protons and electrons‚ they behave exactly the same in chemical reactions. Radioisotope - The nuclei of some isotopes of an element are unstable and tend to break
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side of the noble gases. * These five toxic‚ non-metallic elements make up Group 17 of the periodic table and consist of: fluorine (F)‚ chlorine (Cl)‚ bromine (Br)‚ iodine (I)‚ and astatine (At). * Although astatine is radioactive and only has short-lived isotopes‚ it behaves similar to iodine and is often included in the halogen group. * Since the halogen elements have seven valence electrons‚ they only require one additional electron to form a full octet. This characteristic makes them
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white Electron Shell Configuration Number of Energy Levels: Three (3) First Energy Level: Two (2) Second Energy Level:Eight (8) Third Energy Level: Three (3) Isotopes In total‚ Aluminium has approximately 23 known isotopes ranging from Al-21 to Al-43‚ with two of these isotopes occurring naturally on Earth. Aluminium isotope Al-26 with a half-life of 730‚ 000 years‚ is only found naturally on Earth in very small traces‚ and is formed by the cosmic-ray bombardment of argon in the Earth’s atmosphere
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organ function‚ detection and treatment of some diseases or monitoring of treatment’s effects. It provides physiological (not available from other imaging modalities) and diagnostic information. In the other hand‚ it uses very small amounts of radioactive material (radiopharmaceuticals‚ RP) that is introduced into the body and acts as a tracer. Information obtained using nuclear medicine techniques is more comprehensive than other imaging procedures because it demonstrates organ function‚ not just
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a given element are identical (not accepted today bc isotopes) 3. Atoms are neither created nor destroyed in chemical reactions (Lavoisier) 4. Atoms of different elements form compounds in whole number ratios (Proust) * J.J. Thompson (1897) – PHYSICIST WHO DISCOVERED ELECTRONS (e-) * The cathode ray * “plum pudding model” aka Chocolate Chip Cookie or Blueberry Muffin Model of an atom with electrons * Ernest “radioactive man” Rutherford (1907) – “gold foil experiment” *
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Radiopharmaceuticals Used For Imaging Mechanism of Localization of Radiopharmaceutical Patient Preparation Imaging Protocols Image Findings Technical Considerations Multi-Gated Acquisition Scan (MUGA) Is a nuclear medicine test that uses a radioactive isotope called a tracer to access how well the human heart is pumping blood Multi-Gated Acquisition Scan MUGA Scan Also known as: Gated Blood Pool Imaging Radionuclide Angiography (RNA) Radionuclide Ventriculography (RVG‚ RNV) Myocardial Perfusion
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