Discussion: The method by which the mass of a single object was calculated in part 1, is similar in many ways to the method by which the elementary charge was calculated in part 2. Once the relevant data set was either collected or calculated it was first ordered from greatest to least. Next, the first differences between consecutively ordered masses/charges were determined. Thirdly, first differences that were significantly closer to zero than the rest were removed from the data set. Fourthly
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ACTIVITY: UNDERSTANDING ELECTRONIC CONFIGURATION, VALENCE AND VALENCE ELECTRONS. You are provided three necklace chains with 17 beads and one button. Consider the necklace chain as shells, beads as electrons and button as nucleus. You have to fill the electron shells around nucleus by putting these 17 beads into the three necklace chains around button following the Bohr-Burry and Octet Rule. Identify the element, its electronic configuration, valency and number of valence electrons. QUESTIONS AND
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Analysis of a Chemical Reaction Procedure Questions: What do you observe? We observed a white, chalky precipitate forming in the limewater test tube. What does this result indicate? This result indicates that carbon dioxide gas was formed by heating the test tube of NaHCO3. What did you observe in the test tube that you heated? We observed the condensation of water vapour on the mouth of the heated test tube. What does this indicate? This result indicates that water molecules were formed during
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Background: The Disappearing Spoon written by Sam Kean, informs readers about the importance of the periodic table and how it is important than what people really believe. In this book he talks about how the periodic table is not a table with numbers and letters. It is full of stories and interesting facts, which makes it standout. This book is more likely written for science and chemistry student and can not leave out the outstanding teachers for example Mrs. Nix. Summary: The reason Sam Kean
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Introduction “To what extent was the use of chemical weapons a successful strategy used by the USA (against the NVA and Vietcong) in the Vietnam War from 1956 – 1972?” The aims of this research task is to give reason for the American introduction of chemical weapons in the Vietnam War and also to state its effectiveness in combating the NVA and Vietcong forces and the long term effects of chemical weapons which lead the US forces out of Vietnam and force compensations to this day. The military strategy
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9.8. KARPLUS CURVE – VARIATION OF COUPLING CONSTANTS WITH DIHEDRAL ANGLE The Coupling constant, J varies with dihedral angle Figure 9.15. Staggered and eclipsed conformations Vicinal Coupling (3J) For Vicinal protons value of coupling constant varies with dihedral angle. Vicinal protons are the protons separated by three bonds. Dihedral angle between two axial hydrogen is 180° while the axial equatorial and equatorial equatorial dihedral angles are both 60°. The coupling constant reaches a maximum
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Many new weapons cause World War 1 to change. The main weapons were gas attacks, gas masks, machine guns, zeppelins, and tanks. The gas attack and mustard gas were created by the Germans. It was very hard for the troops to fight with gas masks. They had big guns and could not hold the mask on their face while fighting. Back in the days, machine guns were huge and heavy, but they were very powerful. Tanks were slow, but it helped fight through mud and water. Zeppelins were like modern-day blimps.
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Do the disadvantages of copper mining outweigh the advantages of the metal to society? Copper is one of the most important, irreplaceable metals implemented in today’s society. It has an atomic number of 29 (29 protons, 29 electrons, 35 neutrons), a relative atomic mass of 63.546 amu (see Figure 1), a melting point of 1084.62°C and an electron configuration of [Ar] 3d10 4s1 (see Figure 2). Copper is a tough, ductile, malleable metal that possesses extremely high thermal and electrical conductivity
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This book is written Sam Kean and in this book, he puts they ways chemistry is used in the real world and how it is applied. The book not only uses different elements and uses it in diverse ways, he creates in a good way to read and shows how chemistry is used in that everyday life. In this section, Kean clarifies how molecules now and again require electrons to feel finish and that is the reason particles are made. Particles are made when iotas or atoms take electrons or offer electrons to another
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Throughout the initiation of the various wars that took place in the year between 1845-1991, the advancement of various weapons and other technological developments also took place. As a point of importance, Chemical Gases and generally, Chemical Warfare are considered, by many historians, as a decisive weapon used against the enemies, albeit sometimes unsuccessfully. By late 1915, in World War I, gas warfare had become a psychological as well as physical weapon. Much as the artillery barrages
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