analyzed‚ we shall find out if the benefits or limitations of nuclear technology outweigh the other. Nuclear reactors use a very commonly found material as their main source for producing electricity‚ uranium. There are a few different uranium isotopes that exist on earth‚ with uranium-235 as the most powerful and uranium-238 as the most abundant. Uranium-235 is a very fissile material‚ which means that its atoms can be easily split apart by a neutron‚ releasing two lighter nuclei‚ three neutrons
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Chemistry: It is the science concerned with the atomic composition of substances‚ elements and their interactions‚ and the formation‚ decomposition and properties of molecules. -Biological chemistry or Biochemistry is the biological or physiological chemistry of living organisms and of the chemical changes occurring therein. Structure of Matter: All living and nonliving things are composed of matter. Matter; is anything that occupies space and has mass. Mass is the amount of matter in an object
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consideration. On one hand‚ nuclear energy is not renewable‚ so the problem of nuclear waste is still unsolved. Nuclear waste is a waste produced by radioactive fissions. Unlike normal refuse‚ nuclear waste can be very harmful to all creatures. Radioactivity reduces over long periods of time‚ so the waste must be isolated until its radioactive isotopes to decay. For instance‚ a period of 10 to 50 years will make low-level wastes no longer dangerous. Moreover‚ wastes from the core of
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M12/4/PHYSI/HP3/ENG/TZ2/XX 22126515 Physics Higher level Paper 3 Candidate session number 0 0 Examination code Friday 11 May 2012 (morning) 2 1 hour 15 minutes 2 1 2 – 6 5 1 5 INSTRUCTIONS TO CANDIDATES • • • • • • • Write your session number in the boxes above. Do not open this examination paper until instructed to do so. Answer all of the questions from two of the Options. Write your answers in the boxes provided. A calculator is required for this paper. A clean copy of the
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During and after World War II Australia began supplying uranium for the US and UK ’s weapons programs‚ and this is how Australia got involved. British weapons tests in South Australia and Western Australia 1952-63 left a long line of health problems for Aborigines and armed service personnel‚ as well as significant environmental damage. Let ’s face it. We don ’t want safe nuclear power plants. We want NO nuclear power plants —A spokesman for the Government Accountability Project‚ an offshoot of
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hospital. The medicine nuclear pharmacists handle is called a radiopharmaceutical. Handling radiopharmaceuticals expose the pharmacists to radioactive materials which can arebe harmful if not monitored safely. In the workplace‚ nuclear pharmacists use what are called ring badges and body badges which monitor extremity and whole body exposure to the radioactive materials they use. The government has set special limits‚ for the pharmacist’s safety‚ as to how much radiation they can be exposed to. Most
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nuclear fuel elements? Nuclear fuel elements are made of uranium oxide‚ which is a naturally found form of uranium. It is enriched with uranium .235. Nuclear fuel elements can be used to produce large amounts of energy. Where does heat energy from radioactive decay come from? Heat decay is formed when radiation reacts with a material. The energy of either alpha‚ beta or gamma radiation is converted into heat energy. An example of this occurring in nature is in the core of the earth‚ when this is constantly
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valence shell on each of these. Ions Loss or gain of an electron makes an atom into an ion. + Gaining an electron makes a positive or negative ion? - Losing an electron makes a positive or negative ion? Isotopes Atoms that gain or lose a neutron become isotopes. Radioactive isotopes are used in medicine for imaging (such as PET scanners). Why is this important? • Each element has distinct properties: color‚ melting point‚ reactivity‚ etc. • The basic atomic structure of each element determines that element’s
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Environment: a sum of all the conditions surrounding us that influence life Environmental Science: the field that looks at interactions among humans and nature System: a set of interacting components that influence one another by exchanging energy or materials Ecosystem: the living and non-living components of a particular place on earth Biotic: the living part of the Earth (animals‚ plants) Abiotic: the non-living part of the Earth (soil‚ air‚ water) Environmentalist:any person who advocates
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Californium Cf Californium is a radioactive metal found in the actinide category of the periodic table. Its standard attomic weight is 251 and is elemenent numer 98. History Californium was first synthesized at the University of California‚ Berkeley by the physics researchers Stanley G. Thompson‚ Kenneth Street‚ Jr.‚ Albert Ghiorso‚ and Glenn T. Seaborg on or about February 9‚ 1950. It was the sixth transuranium element to be discovered; the team announced its discovery on March 17‚ 1950
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