Gr7 Science: Applications of the Atom Can The Demonstrated Vast Destructive Power of Nuclear Bombs Continue To Act As A Deterrent To World War III? In early August 1945 an American B-‐29 bomber‚ along with two other planes‚ dropped Little Boy onto the Japanese City of Hiroshima. Then
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photon‚ neutron none of the above 2. The symbol 63 Cu represents an isotope of the element copper. Give the following values: atomic 29 number‚ mass number‚ number of neutrons‚ number of electrons‚ and number of protons. A. B. C. D. E. atomic # 63 63 29 29 29 mass number 29 29 63 63 92 # of neutrons 34 63 29 34 63 # of electrons 63 63 63 29 29 # of protons 63 29 63 29 29 3. Which of the following statements about isotopes is/are correct? i. ii. iii. iv. v. They have different masses. They have
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nonreactive gas‚ it has very few chemical properties. However‚ Xenon can chemically bond with fluorine and oxygen to create many compounds. Metallic and colored Xenon compounds have been produced. In addition‚ Xenon has 9 stable‚ and 20 unstable isotopes. Xenon is not toxic‚ but its compounds are because they have oxidizing‚ the ability to chemically combine with oxygen‚ characteristics. (https://sites.google.com/site/xenonthe5thnoblegas/description) 3. DISCOVERER AND ITS PICTURE
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Chp. 4 Biology Study Guide Page 1 8/30/2011 BIOLOGY STUDY GUIDE CHAPTER 4– THE CHEMICAL BASIS OF LIFE Matter = anything that takes up space and has mass (major types of matter = solid‚ liquid‚ and gas) Any type of matter is made of one or more elements. o Element = a substance that cannot be broken down into other substances by regular chemical processes. (examples: gold‚ silver‚ mercury‚ etc.) There are approximately 25 elements necessary for life. • Examples: oxygen‚ carbon‚ hydrogen‚
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Radioisotopes are radioactive isotopes of an element. An isotope is an element’s atom that has the same number of protons and electrons‚ but a different number of neutrons‚ causing the atom to be unstable. With radioisotopes‚ they can occur naturally‚ but most often are formed artificially by altering the atom. Scientists measure the rate of which radioisotopes decay at by using the term half-life. This refers to when one-half of the radioactive material has decayed. When the word radioactive comes
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Cobalt 60 Mode of decay: Beta particles and gamma radiation Chemical properties: Metallic solid that can become magnetically charged What is it used for? Co-60 is used medically for radiation therapy as implants and as an external source of radiation exposure. It is used industrially in leveling gauges and to x-ray welding seams and other structural elements to detect flaws. Co-60 also is used for food irradiation (http://www.cdc.gov/ncidod/dbmd/diseaseinfo/ foodirradiation.htm)‚ a sterilization
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Unit 2 Lesson 3 The kinetic theory of matter explains that matter is made up of particles‚ which are in constant motion resulting in the different states of matter. Matter is made of constantly moving particles‚ which tells us how the matter in solids‚ liquids‚ and gases behaves. When molecules bump into each other‚ they do not gain or lose energy‚ they only transfer it‚ so there is no net energy change (law of the conservation of energy). In a solid‚ molecules vibrate in a fixed position
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When a really large unstable isotope changes into to smaller isotopes that are 2 completely different elements. the nucleus has to be larger than 230(mass). They are really slow and spontaneous. Fission = splitting. Can create a chain reaction. (picture above). Critical mass= must be enough mass in a reaction or enough fission type mass‚ fissionable mass‚ for the reaction to continue to go on.(minimum amount). Sub critical mass= mass of fission material that doesn’t have enough to keep the reaction
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A radioisotope is an isotope of an element with different masses‚ whose nuclei are unstable and dissipate excess energy by spontaneously emitting radiation in the form of alpha‚ beta‚ and gamma rays (Radioactive Isotopes‚ 2017). Radioisotopes have many different uses in the real world‚ but some of the most beneficial uses are in the field of medicine. Technetium‚ more specifically technetium-99m‚ is used in tens of millions of medical diagnostic procedures annually‚ making it the most commonly
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SUBMITTED BY: Teresita C. Ojastro SUBMITTED TO: Mrs. Pilar M. Macabinguil MALOH PROVINCIAL COMMUNITY HIGH SCHOOL DUMAGUETE CITY NEGROS ORIENTAL 6200 Mrs. Pilar M. Macabinguil ENGLISH IV Teacher MPCHS Madam: In partial fulfillment of the requirement in ENGLISH IV‚ I hereby present to you my term paper entitled “What is Radiation?” This term paper presents a research study on the importance about radiation and how
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