Atomic Structure Quiz Sample Questions 1. Why do only the number of protons and the number of neutrons make up the atomic mass of an element‚ but not the electrons? We generally do not use the number of electrons when calculating the atomic mass of an atom because they weigh so little (precisely 1/1836 AMU)‚ and only in precise calculations are the masses of the electrons included in atomic mass. 2. What was the difference between Mendeleev’s table and Mosley’s new arrangement? Mendeleev arranged
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The castle passed to Asano Nagaakira in 1619‚ and Asano was appointed the daimyo of this area. Under Asano rule‚ the city prospered‚ developed‚ and expanded‚ with few military conflicts or disturbances.[4] Asano’s descendants continued to rule until the Meiji Restoration in 1868.[5] Hiroshima served as the capital of Hiroshima Domain during the Tokugawa period. [edit]Imperial period Hiroshima Commercial Museum 1915 After the han was abolished in 1871‚ the city became the capital of Hiroshima
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Provide one argument for and one argument against increasing current funding for atomic-structure research. Use specific examples from this lesson in your answers to support each position. The use of the MRI (magnetic resonance imaging) machine is a topic of debate with arguments for and against its use of this machine for medical purposes. An argument that supports the use of the MRI is that research in this field of atomic structure has already led to numerous advances that have provided great public
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The coverage in St. Petersburg´s newspapers about the murderer‚ Gavrilo Princip‚ highlights his identity‚ his partners and his motives for the crime. “Exchange Statements” compared the interrogations of the member that threw the first bomb‚ Chabrinovich‚ who didn´t hide his satisfaction for the death of the Archduke but regretted the death of Sophie‚ and Princip‚ who was “utterly defeated and depressed”. The newspapers described Princip as a “schoolboy”‚ “a young Serbian patriot”‚ “a mad killer”
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time‚ but also the literary works. Dr Manhattan‚ clearly named after the Manhattan project‚ is used as a weapon by the government‚ mirroring the use of the Atomic Bomb. Not only this‚ Dr Manhattan‚ when choosing his symbol‚ chooses the hydrogen atom as his emblem. This symbol shows the strong connection between Dr Manhattan and the hydrogen bomb. Through thorough analysis of his character‚ it is clear that because of his unique qualities‚ his perceptions of time‚ life and humanity are different from
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long it was sitting in the room). The bucket was then placed in the calorimeter in a certain way. At the bottom of the bucket‚ there were 3 “dents” which were aligned with the dents at the bottom of the calorimeter jacket (#14). The oxygen combustion bomb (#15) was then opened and roughly 10 cm of the wire (metal wire provided by the instructor) was cut and attached to the arms of the cup so the pellet of choosing (which was either the Naphthalene or the Benzoic Acid) would ignite with the wire and
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Experiment 3: Resonance Energy of Naphthalene by Bomb Calorimetry Cameron Fowler CHEM 457: Lab Section 4 Submitted: 11/4/10 Lab Group #3: Michael Hyle Neil Baranik Tim Riley Abstract: The enthalpy of combustion of naphthalene was experimentally determined to be -5030.44 ± 78.98 kJ/mol which was a 2.5% error from the literature value of -5160 ± 20 kJ/mol.2 The theoretical enthalpy of combustion of solid naphthalene was calculated to be -6862.68 kJ/mol using bond energies for the gaseous
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Quite a few scientists have helped to create and extend ideas on what an atom is and what its components are. One of these discoverers‚ John Dalton‚ developed the first modern atomic theory. Although much of his theory is still true today‚ one point was disproved by Ernest Rutherford. Dalton’s atomic theory had several parts to it. He believed atoms were indivisible‚ or impossible to break down into smaller particles. Also‚ he said elements are all consisted of atoms and that the atoms of
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Mass Determination of Ca‚ Fe and Zn in a multivitamin using Atomic Absorbance Spectroscopy (AAS) and X-Ray Fluorescence Spectroscopy (XRF) ABSTRACT: The purpose of this project was to determine the amount of calcium‚ iron and zinc present in an over the counter multivitamin. This mass was determined using atomic absorption spectroscopy (AAS) and X-ray fluorescence spectroscopy (XRF). For both analytical techniques‚ the method of standard additions was used to compensate for matrix effects.
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Dropped the Atomic Bomb in Hiroshima and Nagasaki? On August 6 and 9‚ 1945 the cities of Hiroshima and Nagasaki were destroyed by the first atomic bombs used in warfare. The United States decision to drop an atomic bomb on Hiroshima was strictly military measure calculated to intimidate the Soviet Union in the post-Second-World-War era rather than a strictly diplomatic measure designed to force Japan’s unconditional surrender. The three most important reasons to use the atomic bomb were; End War
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