Name: Cayla Klimach Date: 2/13/15 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? :Cheese‚ tomato sauce‚ meat 2. What substances make up water? Hydrogen & Oxygen (H2O) 3. What substances
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nature‚ rather than being man made. Outside the laboratory‚ francium is very rare‚ with trace amounts found in uranium and thorium ores‚ where the isotope francium-223 continually forms and decays. As little as 20-30g exist at any given time throughout the Earth’s crust; the other isotopes are synthetic. The largest amount ever collected of any isotope was a cluster of about 10‚000 atoms (of francium-210) created as an extremely cold gas at Stony Brook in 1997. Francium can be made artificially
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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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Isotopes and Atomic Mass It’s Vegium I. Purpose The purpose of this lab is to determine the average weights of each isotope of the “element” vegium‚ determine the relative abundance of isotopes of vegium‚ and calculate from experimental data the atomic mass of vegium. II. Apparatus Sample of vegium‚ balance‚ weighing cups III. Data Tables | |Beanium |Peaium |Cornium |Total
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among 21 million people‚ 470‚000 of these using reactor isotopes. The use of radiopharmaceuticals in diagnosis is growing at over 10% per year. Nuclear medicine was developed in the 1950s by physicians with an endocrine emphasis‚ initially using iodine-131 to diagnose and then treat thyroid disease. In recent years specialists have also come from radiology‚ as dual CT/PET procedures have become
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27 21. P+ and Q are isoelectronic with a) b) c) State the nucleon number of the isotope X State the number of protons in P and Q Identity the element P and Q 22. Do you agree with the statements below? If yes‚ mark () and if no‚ mark () No. Statement a. b. c. d. e. f. g. Any element can have only 2 isotopes 2 isotopes of an element may not have the same proton number Most elements do not have isotopes Isoelectronic particles must have the same number of electrons. Isoelectronic particles
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the filter paper‚ they had actually discovered einsteinium253: an isotope of einsteinium. There are approximately 20 known isotopes of einsteinium‚ and none of those isotopes are stable. The most stable isotope is einsteinium254. Einsteinium is a synthetic element which is produced through a long series of nuclear reactions. In these reactions‚ each isotope in the series is bombarded with neutrons and then the resulting isotope is allowed to undergo beta decay. The yearly production of einsteinium
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atoms of one element form the atoms of another? Elements are different because they contain different numbers of protons. 27. How do the isotopes of a given element differ from one another? Isotopes of an element have different numbers of neutrons‚ they also have different mass numbers. 28. How is atomic mass calculated? Multiply the mass of each isotope by its natural abundance‚ expressed as a decimal‚ and then add the products. 29. What equation
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times as dense as water. Like other elements‚ uranium occurs in several slightly differing forms known as ’isotopes’. These isotopes differ from each other in the number of uncharged particles (neutrons) in the nucleus. Natural uranium as found in the Earth’s crust is a mixture largely of two isotopes: uranium-238 (U-238)‚ accounting for 99.3% and uranium-235 (U-235) about 0.7%.The isotope U-235 is important because under certain conditions it can readily be split‚ yielding a lot of energy. It is
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and mass. 4. Describe the structure of the nuclear atom‚ including the locations of the subatomic particles. Images‚ p. 96 Section 4.3 5. Explain the role of atomic number in MiniLab: Modeling Isotopes‚ p. 102 How Atoms Differ 2 sessions 1 block determining the identity of an atom. 6. Define an isotope and explain why atomic masses are not whole numbers. 7. Calculate the number of electrons‚ protons‚ and neutrons in an atom given its mass number and atomic number. Section 4.4 8. Explain the relationship
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