Name: _____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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BSC 1020 – Homework Unit B The Molecules of Life This homework is worth 25 points of the 900 points available in the course. Please use the book‚ PPT lecture handouts‚ and internet to answer the following six questions: Question 1 (8 points) Mr. Tony‚ a biology teacher‚ gives his student Ziad four samples and tells him they are lysine (an amino acid)‚ lactose (a disaccharide)‚ insulin (a protein hormone)‚ and RNA. The samples are in test tubes marked 1‚ 2‚ 3‚ and 4‚ but Ziad is
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is a chemical change What is in a plant cell: - Nucleus - Chloroplast - Nucleolus - Tonoplast - Vacuole - Plasmodesmata - Cell wall They are placed in the periodic table based on their atomic number Atomic number is number of protons found in nucleus The mass number is the total number of protons and neutrons’ in the nucleus The first line of defense against disease if your skin Diseases are spread through the air‚ from direct or indirect contact with another person‚ soiled objects
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lot of space in where it can break up the bonds which need to be broken up. When it is in hot water it can easily be broken up and it reacts much more quickly. The electron configuration for magnesium is 1s2 2s2 2p6 3s2 and this is because its atomic number is 12‚ it has 12 ionic bonds and they are placed in the different shells in which the nucleus orbits this element‚ on its outer shell there are 2 bonds and this shows that it is stronger than sodium because sodium only has
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upon current knowledge of electrons. b. The elements should be arranged based upon the number of neutrons. c. The periodic table should be organized based upon atomic number. d. The periodic table should be organized based upon chemical properties. 2. What is significant about elements in the same group on the periodic table? (3.02) a. They have the same number of protons. b. They have the same number of electrons. c. They have the similar chemical properties. d. They are all noble gases
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Decision to Drop the Bomb By Jung Oh Introduction Of all the political and military decisions in history‚ few have been subject to more analysis and comment than the atomic bombings of Hiroshima and Nagasaki (Miles‚ 1985‚121). Scholars in the field have grappled with the vexing question of why the United States decided to use the atomic bomb near the conclusion of the Second World War. A careful study of the critical events leading up to 6 August 1945 offers many distinct explanations. Contemporary
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and in its pure state it is a grayish silvery metal. It is soft and ductile and it has good corrosion resistance to alkalis‚ sulphuric acid‚ hydrochloric acid‚ and salt waters. Its element symbol is V and its atomic number is 23. On the periodic table it is in group 5 and in period 4. Its atomic mass is 50.9415‚ and the history of Vanadium can be traced back to 1801. In 1801‚ Vanadium was discovered by Andres Manuel del Rio in Mexico. He prepared salts form the mineral vanadinite (then known
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58 Ce 140.12 91 Pa 231.04 59 Pr 140.91 73 Ta 180.95 56 57 † 72 55 Ba La Cs Hf 132.91 137.34 138.91 178.49 92 U 238.03 60 Nd 144.24 74 W 183.85 42 Mo 95.94 24 Cr 52.00 Relative atomic mass Element Atomic number 40 Zr 91.22 39 Y 88.91 4 Be 9.01 2 3 Li 6.94 1 H 1.01 1 29 Cu 63.55 30 Zn 65.37 93 Np (237) 94 Pu (242) 95 Am (243) 96 Cm (247) 97 Bk (247) 98 Cf (251) 61 66
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investigated from 294 up to 1073K by neutron powder diffraction. The cell parameters and fractional atomic coordinates in the α phase tend towards the values found in the β phase. The first order transition of FePO4 is at 980 K‚ during which several observations are made. Firstly‚ the cell parameters and fractional atomic coordinates show discontinuous shifts. Secondly‚ the intensities of a large number of diffraction lines decrease‚ as shown in Fig. 1. Lastly‚ bond distances and angles change dramatically
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the mass. The most massive ions are deflected the least and vice versa. 2. Isotopes: atoms that have the same atomic number‚ but different mass number. (Same number of protons but different number neutrons.) 3. Mass and charge influence the degree of deflection in the magnetic fields Mass+ deflection-(65cu+<63cu+) charge+ deflection+ (63cu2+>63cu+) 4. The MS provides us: number of isotopes‚ relative isotopic mass (Ir) of each isotope‚ relative abundance. 5. Ar=Ir (1) x %abundance (1)
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