chemistry is known as today. Taken from the encyclopedia‚ commonly known as Wikipedia‚ is the origins of this fascinating type of chemistry. After the discovery of X-rays by Wilhelm Röntgen‚ a French chemist Henri Becquerel began to work on ionizing radiation and investigated the relationship between phosphorescence and the blackening of photographic plates. See the “Discovery of Radioactivity” article’s diagram below at end of paragraph. Becquerel discovered that‚ with
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Write your name here Surname Other names Centre Number Candidate Number Edexcel GCSE Physics/Science Unit P1: Universal Physics Higher Tier Friday 2 March 2012 – Morning Time: 1 hour You must have: Calculator‚ ruler Paper Reference 5PH1H/01 Total Marks Instructions black ink or • Usein the boxesball-point pen. page with your name‚ at the top of this • Fill number and candidate number. centre all • Answer thequestions. in the spaces provided questions
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produces hot-spot images‚ which reveal early signs of disease and map how organs are functioning. The low energy gamma radiation it emits‚ the small dose in which it’s injected and it a short half-life (6hours)‚ minimises damage to tissues. The patient’s total exposure to radiation is less than in an X-ray. So far‚ there have been no reported side effects. But use of radiation on the human body can carry many side effects. For instance‚ the high-energy beta-emissions from Co-60 used in radiotherapy
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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 meet four kinds: alpha radiation‚ beta radiation‚ gamma radiation and x radiation. Alpha radiation is weighty‚ that includes a very-short variety element and is in fact a homeless helium nucleus. Some examples of alpha radiation are radium‚ radon‚ uranium
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RADIATION HISTORY Basic Terminology Radiation - A form of energy carried by waves or stream of particles (photons) X-radiation - A high-energy radiation produced by the collision of a beam of electrons with a metal target in an x-ray tube High-energy Radiation - A form of radiation that is able to pass through substances (e.g. the human body) X-ray - A beam of energy that has the power to penetrate substances and record image shadows on photographic film Radiology
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waves are involved. Waves do not have mass or charge. Photons All electromagnetic radiation consists of photons. A photon is a packet of energy‚ or a quantum of electromagnetic energy. Gamma-photons are the most energetic out of all the types of photons. The energy of a photon is directly proportional to the frequency of the electromagnetic radiation of which it is a part of‚ so high frequency radiation means high energy
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Nuclear Chemistry Imagine the majority of Earth being quarantined off and people having to live in specified areas to avoid harmful radiation that originated from nuclear energy/waste. The integration of nuclear energy/medicine is largely controversial among people. Every side to the argument has its benefits as well as its negative consequences. Nuclear energy should not be used in society because of the threat it poses to thousands of people. In contrast‚ nuclear medicine has positive aspects that
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Organic chemistry is the study of essentially all substances containing carbon. Organic compounds that contain only carbon and hydrogen are called hydrocarbons. The simplest hydrocarbons are the alkanes which contain only single covalent bonds. Methane is the simplest alkane. It is also the major component of natural gas. Methane contains only 1 carbon in the molecular formula and the structural formula. There is ethane which is 2 carbons‚ propane that is 3‚ butane which is 4‚ pentane which is 5
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WIRELESS TRANSMISSION 1.2 RADIO PROPAGATION: Radio propagation is the behavior of radio waves when they are transmitted‚ or propagated from one point on the Earth to another‚ or into various parts of the atmosphere. As a form of electromagnetic radiation‚ like light waves‚ radio waves are affected by the phenomena of reflection‚ diffraction‚ and scattering. ERIC SAVIOUR ARYEE OKAI‚ OCT‚ 2013 ASSIGNMENT #1 With the aid of simple diagram(s)‚ explain the three propagation phenomena. ERIC SAVIOUR
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visualisation of the pattern of distribution of radiation. In general‚ the radiation consists of X-rays‚ gamma (g ) or beta (b ) rays‚ and the recording medium is a photographic film. For classical X-rays‚ the specimen to be examined is placed between the source of radiation and the film‚ and the absorption and scattering of radiation by the specimen produces its image on the film. In contrast‚ in autoradiography the specimen itself is the source of the radiation‚ which originates from radioactive material
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