Gallium is a chemical element that is located in Group 13 or the “Boron Group” on the periodic table of the elements. It has the chemical symbol Ga and has an atomic number of 31 meaning it has 31 protons and 31 electrons. The atomic mass of Gallium is 69 meaning it has 38 neutrons. Gallium is a transition metal and was discovered in 1875 by French Chemist Paul Emile Lecoq de Boisbaudran after the element was predicted by Dmitri Mendeleev who created the periodic table of the elements in the 1860s. Boisbaudran
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engineering technology. This means many people is using mobile devices‚ computers and televisions for social‚ wind turbines and advanced battery system for green energy‚ and so forth. The essential needs to make for those devices are the rare earth elements (REE) what are the fifteen lanthanides plus scandium and yttrium as defined by International Union of Pure and Applied Chemistry (IUPAC). Around 1950s‚ India‚ Brazil and South Africa were the leaders of the world’s REE production. But the Mountain
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14 ELEMENTS OF A SUCCESSFUL SAFETY & HEALTH PROGRAM Element 1: Hazard Recognition‚ Evaluation and Control. Establishing and maintaining safe and healthful conditions required indenifing hazards‚ evaluating their pontential effects‚ developing ways to eliminate or control them and planning action priorities.This process is the essence of successful safety and health management. Element 2:Workplace Design and Engineering Safety and health issues are most easily and economically addressed when facilities
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Proud Parents of Lead Page 1 Name of element: Kobe Lead Nickname of element: (Pb) Birth Date: Ancient Times Birth Weight: 207.2 Race: Metal Attending Physician: Unknown Gender: Solid Place of Birth: Many different countries Personality: (melting- 600.61 K --- 327.46 C --- 621.43 F) (Boiling- 2022 K --- 1749 C --- 3180 F) Page 2 Pronunciation Rebus: lēd/ Page 4 # of protons: 82 # of neutrons: 125 # of electrons: 82 Atomic number: 82 Page 6 Family Name: Carbon Family Address:
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Sodium was first discovered by Sir Humphrey Davy in 1807. This element is the 11th element found on the periodic table; located in group 1 and period 3. Its chemical symbol is Na and it is classified as a metal. Metals‚ by definition‚ means that they are elements that are luster‚ lose electrons very easily‚ malleable‚ ductile‚ and are great conductors of heat and electricity. Sodium is found in group 1 of the periodic table because the electronegativity of sodium is very low. This allows it to form
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2. Element X melts in boiling water‚ it fails to react with hydrochloric acid; and 1 cm3 of element X has a mass of 1.8 grams. Is element X a metal or non-metal? Give the reasons for your answer. Element X is most likely a typical non-metal. First of all‚ element X melts in boiling water; non-metals typically have low melting and boiling points. Furthermore‚ element X is unable to react with hydrochloric acid. This greatly indicates that element X is a non-metal as most non-metals fail to
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Finite Element Analysis Introduction Finite element analysis (FEA) has become commonplace in recent years‚ and is now the basis of a multibillion dollar per year industry. Numerical solutions to even very complicated stress problems can now be obtained routinely using FEA‚ and the method is so important that even introductory treatments of Mechanics of Materials – such as these modules – should outline its principal features. In spite of the great power of FEA‚ the disadvantages of computer
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Are superheavy elements really so unstable that there is no point trying to synthesis new elements? This leads to the question: ‘How does the size of an element affect the stability?’ What are superheavy elements? The scientific term ‘superheavy’ means elements that have an atomic number that is heavier than‚ element 101‚ which is Rutherfordium. As they suffer from radioactive decay when exposed to lighter elements‚ they are not naturally occurring. Meaning‚ scientists can only artificially make
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Journal of Biomechanics 45 (2012) 2698–2701 Contents lists available at SciVerse ScienceDirect Journal of Biomechanics journal homepage: www.elsevier.com/locate/jbiomech www.JBiomech.com Short communication Beyond finite elements: A comprehensive‚ patient-specific neurosurgical simulation utilizing a meshless method K. Miller n‚ A. Horton‚ G.R. Joldes‚ A. Wittek Intelligent Systems for Medicine Laboratory‚ The University of Western Australia‚ Crawley‚ Perth‚ Western Australia 6909‚ Australia a
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Observation of Different Photons when Elements are Heated Introduction: The bright line spectrum is the range of colorful lights that are emitted from an atom in its excited state. A “normal” atom‚ or an atom in its ground state‚ is when all of the atom’s electrons are in their proper energy level. When an atom is in its excited state‚ electrons jump to different energy levels making them unstable. As the electron tries to get back to its respective energy level‚ energy is emitted in the form
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