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NOBLE GASES (YOUTUBE VIDEO)

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The noble gases are elements of class VIIIA (8) in the periodic table. It is noble because these elements are very stable (very difficult to react). The first element of the noble gas found is argon. No natural compound of noble gas was found. The stability of this noble gas is due to its fully charged electron configuration, the octet configuration (duplet for Helium). The stability of noble gases is reflected by its enormous ionisation energy, and its very low electron affinity (marked positive). The noble gas elements are the longest studied by scientists because to make them alone, the first compound made of xenon requires a high temperature of XePtF6 Precious gases are gases that are inert, nonreactive, and hard to react with other chemicals. Noble gas is widely used in the industrial sector. Here are the noble gases: • Helium • Neon • Argon • Krypton • Xenon • Radon 1. Helium Helium is a chemical element in the periodic table that has the symbol He ...
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SYNTHETIC OIL

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Synthetic oil is a lubricant consisting of chemical compounds that are artificially made. Synthetic lubricants can be manufactured using chemically modified petroleum components rather than whole crude oil, but can also be synthesized from other raw materials. Synthetic oil is used as a substitute for petroleum-refined oils when operating in extreme temperature. Aircraft jet engines, for example, require the use of synthetic oils, whereas aircraft piston engines do not. Synthetic oils are also used in metal stamping to provide environmental and other benefits when compared to conventional petroleum and animal-fat based products. These products are also referred to as "non-oil" or "oil free". Types Group IV: PAO Poly-alpha-olefin (or poly-α-olefin, abbreviated as PAO is a polymer made by polymerizing an alpha-olefin. They are designated at API Group IV and are a 100% synthetic chemical compound. It is a specific type of olefin (organic) that is used...
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LESSON PLAN MOLECULAR SHAPE

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LESSON PLAN I. Identity School : SMA NEGERI 1 BATANGHARI Subject : Chemistry Year/semester : XII MIA 3/1 Time Allotment : 3 hours (3 x 45minutes) II. Standard Competence Understanding atomic structure to predict periodicity of elements, molecular structure, and properties of compounds. III. Basic Competence 1.            Explain theory of electronic pair around atomic nucleus and theory of hybridization to predict molecular shapes IV. Indicators 1.2.1        Predict the shapes of molecules according to pair electron theory 1.2.2        Predict the shapes of molecules according to hybridization theory V. Learning Outcomes 1.      Student be able to predict molecular shape by using VSEPR theory 2.      Student be able to predict molecular shape by using hybridization theory ...
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REMDEMEN (CHEMISTRY)

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In chemistry, yield , also referred to as reaction yield , is the amount of product obtained in a chemical reaction. The absolute yield can be given as the weight in grams or in moles ( molar yield ). The percentage yield (or fractional yield or relative yield ), which serves to measure the effectiveness of a synthetic procedure, is calculated by dividing the amount of the obtained desired product by the theoretical yield (the unit of measure for both must be the same): percent yield = actual yield theoretical yield × 100 % {\displaystyle {\mbox{percent yield}}={\frac {\mbox{actual yield}}{\mbox{theoretical yield}}}\times 100\%} The theoretical yield is the amount predicted by a stoichiometric calculation based on the number of moles of all reactants present. This calculation assumes that only one react...
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