Sains Malaysiana 41(4)(2012): 445-452 Effects of Spin Contamination on the Stability and Spin Density of Wavefunction of Graphene: Comparison between First Principle and Density Functional Methods (Kesan Pemumusan Spin Terhadap Kestabilan dan Ketumpatan Spin bagi Fungsi Gelombang Grafen pelumusan: Perbandingan antara Kaedah Prinsip Pertama dan Kaedah Kefungsian Ketumpatan) LEE SIN ANG*‚ SHUKRI SULAIMAN & MOHAMED ISMAIL MOHAMED-IBRAHIM ABSTRACT The effects of spin contamination on the
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Unit 1 – Lesson 1 Chemistry Key Questions 1. Element Standard Notation # Of Electrons # Of Protons # Of Neutrons Sodium 23 11 Na 11 11 12 Chromium 24 Ca 26 26 27 ? Phosphorus 32 P 15 15 16 2. Fireworks; Which metals burn to produce these colours? Red – Lithium (Sr) Blue – Cesium (Cs) Pink – Potassium (K) Yellow/Green – Copper (Cu) Orange – Carbon (Ca) 3. Let’s say that the three bottles contain Fe(NO3)3‚ BaCl‚ and AgNO3. These are Iron (III) Nitrate‚ Barium Chloride
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Chemistry is the science of dealing with the compounds‚ elements‚ and molecular structure of matter. Essentially‚ chemistry is the science of examining substances and objects to find out what they’re made of and how the react to different conditions. All projects Accelerate Rusting To demonstrate how a chemical reaction from vinegar‚ water‚ and bleach can accelerate the rusting process of steel. Acids And Bases To determine which chemicals are acids and which are bases. Apple Mummy To
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Section instructor: Supratim Giri Email: girisupr@gmail.com Office: BMBT 416 1 CY 101: Electrochemistry 2 Submarines can propagate on the sea surface just like a ship Unless it’s a nuclear submarine; just like a ship‚ submarine’s propulsion is supplied by a diesel engine The sub intakes oxygen from air to run its diesel engine. But in order to strike an enemy ship‚ it has to take plunge in deep sea and remain submerged for a period between 24 to 48 hours! How the submarine
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PURPOSE: The purpose of this lab is to familiarize ourselves with the techniques associated with separating a mixture of different solids. We will learn how the unique properties of substances can aid in this process and help us distinguish each pure substance from one another. DATA OBSERVATIONS CALCULATIONS CONCLUSION/DISCUSSION QUESTIONS A. How did your proposed Procedures or flow charts at the beginning of this experiment compare to the actual Procedures of this lab exercise? B. Discuss
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Topic 6 Microscopic World II Unit 23 Shapes of molecules Unit 24 Bond polarity and intermolecular forces Key C o ncepts Microscopic World II Shapes of molecules • Covalent molecules with non-octet structures • Shapes of molecules • The VSEPR theory • Molecular crystals of buckminsterfullerene (C60) • Carbon nanotubes Bond polarity and intermolecular forces • Electronegativity and bond polarity • Van der Waals’ forces • Factors affecting the strength
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CHEMISTRY Guess Paper – 2013 Class – XI Subject - CHEMISTRY MAX MARKS=90 ……………………………………………………………………………………… General instructions: All questions are compulsory. Marks for each question are indicated against it. Questions number 1to 8 are very short –answer questions‚ carrying 1 mark each. Answer these in one word or about one sentence each. Questions number 9 to18 are short –answer questions‚ carrying 2 marks each. Answer these in about 30 words each. Questions number19 to27
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Burning Money Chemistry Demonstration Principle You soak a note in ethanol (alcohol) and it will burn when lighted‚ leaving the note untouched. This is because alcohol is more flammable‚ and burning alcohol causes it to vaporize‚ along with the water present in the solution. This removes heat from the note and prevents it from reaching its combustion point. Materials Bill/Dollar bill (higher denomination if you’re brave) Tongs container Matches or a Lighter Salt (or one of these chemicals
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experimental techniques which can be used to tell us where the atoms are located in a molecule. Using advanced techniques‚ very complicated structures for proteins‚ enzymes‚ DNA‚ and RNA have been determined. Molecular geometry is associated with the chemistry of vision‚ smell and odors‚ taste‚ drug reactions and enzyme controlled reactions to name a few. Molecular geometry is associated with the specific orientation of bonding atoms. A careful analysis of electron distributions in orbitals will usually
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Data and Observations: Complete a data table that includes a prediction of reaction type (single replacement‚ double replacement‚ synthesis‚ decomposition‚ or combustion)‚ observations‚ and identification of reaction type for each reaction in the lab. (10 points) Reactants Prediction of Reaction Type Observations Reaction Type Conclusion: 1. Write a balanced equation for each
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