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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nuclear fission currently holds the upper hand as a nuclear fusion reactor is yet to be formed. Nuclear fission occurs when a stable isotope is hit by a neutron causing the isotope to absorb it‚ making it unstable and splitting it apart releasing huge amounts of energy. Nuclear fission is currently used for nuclear weapons and nuclear reactors‚ examples of isotopes that can undergo the process are Uranium235 and Plutonium 239. Advantages of Nuclear fission are that it doesn’t release carbon emissions
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to the human diet. 2.3 Distinguish between the size‚ location‚ and properties of protons‚ electrons‚ and neutrons. 2.3 Define the atomic number and mass number of an atom. 2.3 Define an isotope and explain what makes some isotopes radioactive. 2.4 Describe the uses and dangers of radioactive isotopes. Chemical Bonds 2.5 Explain how the electron configuration of an atom influences its chemical behavior. 2.6–2.8 Distinguish between covalent bonds‚ nonpolar polar covalent bonds‚ polar
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1 1 The nucleus of one of the isotopes of nickel is represented by 60 Ni. 28 Which line in the table correctly describes a neutral atom of this isotope? number of protons A B C D 28 28 60 60 number of neutrons 32 60 28 32 number of orbital electrons 28 28 28 32 2 A nucleus of bohrium x Bh decays to mendelevium y emissions. bohrium x Bh → dubnium + α y → lawrencium + α 255 Md 101 by a sequence of three α-particle → mendelevium 255 Md + α 101 How many neutrons are there in a
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forms when one of the following rocks is metamorphosed? Limestone In which of the following sedimentary rocks would it be easiest to determine the type of rocks from which the sediment was derived? Conglomerates Which of the following radioactive isotopes is the most useful for dating very young wood and charcoal? Radiocarbon The prograde part of a metamorphic P-T path occurs during _________________. Burial and heating Someone brings a piece of wood from Noah’s Arc and asks you to date
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_____Alvaro_________________________________ Date: ________________________ Student Exploration: Element Builder Vocabulary: atom‚ atomic number‚ electron‚ electron dot diagram‚ element‚ energy level‚ ion‚ isotope‚ mass number‚ neutron‚ nucleus‚ periodic table‚ proton‚ radioactive‚ valence electrons Prior Knowledge Questions (Do these BEFORE using the Gizmo.) 1. What are some of the different substances that make up a pizza? _____________________ _________________________________________________________________________
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the power used by these lamps are also used in one of the most destructive weapon‚ the hydrogen bomb. This power is tritium‚ an isotope. Isotopes are elements that have different amounts of neutron (Knapp 11). Tritium is an isotope of hydrogen‚ that is used in modern science and there are also health implication through the exposure of tritium. Tritium is an isotope of hydrogen that has mass number 3. It consists of 1 proton and 2 neutrons (the word ‘tri’ in the name means that it has mass number
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Cited: "Chemistry Explained." Neon‚ Chemical Element. N.p.‚ n.d. Web. 24 Oct. 2012. . Dingrando‚ Laurel. "Electrons In Atoms." Chemistry: Matter and Change. New York‚ NY: Glencoe/McGraw-Hill‚ 2005. N. pag. Print. "The Element Neon[Click for Isotope Data]." It ’s Elemental. N.p.‚ n.d. Web. 24 Oct. 2012. . "The History of Neon Signs." About.com Inventors. N.p.‚ n.d. Web. 24 Oct. 2012. .
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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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nucleus. Within the nucleus‚ there are protons (+) and neutrons (neutral). To find the number of neutrons in an atom‚ you subtract the atomic mass from the atomic number. Atoms of an element can have different amount of neutrons. These are called Isotopes. 19.3 Unstable Nuclei and Radiation Positively charged protons in nuclei tend to repel one another. In order to make the nuclei stable‚ neutrons are present to dilute the forces of repulsion. It acts like a form of “Nuclear glue.” At short ranges
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