Copper disulfate LiF NaCl MgF2 NCl3 Identify the property which decreases across each row of the Periodic Table. (A) (B) (C) (D) Melting point Ionisation energy Valency Atomic radius 11. Which is correct in describing diamond‚ graphite and fullerenes? (A) (B) (C) (D) 13. All have similar physical properties but different chemical compositions. All have the same chemical composition but different physical properties.
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Periodic Table and describe its electron configuration group 4‚ 2.4‚ forms covalent compounds | * describe the structure of the diamond and graphite allotropes and account for their physical properties in terms of bondingdiamond- 4 bonded pairs‚ tetrahedral‚ giant covalent lattice (high melting pint‚ hard‚ doesn’t conduct‚ insoluble- strong rigid bonds)graphite- layer structure‚ no bonds between layers‚ bonds with three- one free electron( can conduct‚ soft‚ low density‚ insoluble- free electron‚ no
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characteristics of cast iron but with low weight. And also aluminum alloy casted engine block gives a good surface finish and high macinability compared with cast iron alloys. As the technology increases the engineers has found new materials such as graphite cast iron which is lighter and stronger than the grey cast iron mentioned above. Grey cast iron alloys Grey cast iron is the first and most material used for manufacturing
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Environmental Impacts of the Battery The creation of the battery was invented in 1859 by a man named Gaston Plante. Over the years as technology advances so do they batteries adding different materials like nickel‚ zinc‚ lead‚ graphite‚ carbon and toxic acids such as acid‚ magnesium dioxide‚ and hydrochloric acid making it one of the most helpful inventions known to mankind. Throughout our everyday lives a lot of things we use require a battery. The disposable battery converts chemical energy
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2.2 2.3 Shapes of molecules and ions 2.3a Electron pair repulsion theory a demonstrate an understanding of the use of electron-pair repulsion theory to interpret and predict the shapes of simple molecules and ions In a chemical species like a molecule or ion‚ pairs of electrons create negative centres that surround the central atom. These electron pairs repel each other and arrange themselves to be as far apart as possible‚ thus minimising repulsion. [pic](source: http://www.mikeblaber.org/oldwine/chm1045/notes/Geometry/VSEPR/Geom02
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piece‚ direct you in all ways‚ keeping the viewers eyes constantly moving throughout the canvas. Compared to Twombly‚ who only used the subtleness of the white wax crayon and the melancholy tone of the graphite. He also inherits the washed out‚ erased effect from places he removed the graphite
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Thought the interview was unnecessary‚ put it in as filler Thought it was all-encompassing and informative Pencil Silverpoint is a graphic medium which preceded the common lead pencil. Instead of lead a point of silver wire is fixed in a wooden holder. Since this will leave but the faintest trace on an ordinary paper surface‚ a special ground must be prepared. A paste of powdered bone or chalk mixed withwater and gum or starch is spread with a stiff brush in thin coats‚ each coat being allowed
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identification. Finally‚ explain your percentage of certainty: What was confusing about this mineral? What other minerals do you think it could be? Remember‚ the minerals in the virtual lab include seven of the following: borax‚ calcite‚ corundum‚ graphite‚ gypsum‚ orthoclase feldspar‚ pyrite‚ quartz‚ talc‚ and topaz. Identification of Mineral Percent Certain Explanation of Certainty Example: Fluorite 80% certain I am almost certain this mineral is fluorite‚ but I am not completely sure. Fluorite
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animal of its rights for the benefit of experimentation and research. "Animals have a basic moral right to respectful treatment . . .. This inherent value is not respected when animals are reduced to being mere tools in a scientific experiment.” (Lonestar) While animals cannot express themselves as humans can‚ they can feel‚ think‚ behave‚ and experience pain. Their inability to express themselves should not be taken advantage of. While the FDA encourages manufacturers to conduct whatever testing
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while retaining the necessary strength to withstand the forces of an engine. As of late‚ new manufacturing processes have been developed that have engendered two new alloys suitable for use in an engine block‚ magnesium alloy AMC-SC1 and compacted graphite cast iron (CGI). In this paper‚ the functional requirements of the engine block‚ the processes used to manufacture the part‚ and the mechanical properties of the alloys will be discussed. 1. Introduction The first successfully working internal
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