'Van der waals bonding' diaporamas de présentation

Electrical Engineering Materials

EE 3219. Electrical Engineering Materials. Dr. Md. Sherajul Islam Associate Professor. Department of Electrical and Electronics Engineering Khulna University of Engineering & Technology Khulna, Bangladesh. LECTURE - 1. Elementary Materials Science Concepts. UNIVERSE. STRONG WEAK

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Crystal Binding (Bonding) Continued More on Van der Waals & Hydrogen Bonding

Crystal Binding (Bonding) Continued More on Van der Waals & Hydrogen Bonding . Van Der Waals Bonding. + -. + -. This WEAK dipole interaction is the origin of the van der Waals bond, which is therefore characterized by a LOW cohesive energy, and so LOW melting temperatures

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The World of Atoms

The World of Atoms. NCSU. Instructor: Dr. Gerd Duscher http:// www4.ncsu.edu/~gjdusche email: gerd_duscher@ncsu.edu Office: 2156 Burlington Nuclear Lab. Office Hours: Tuesday: 10-12pm Objective today: How do atoms arrange themselves ? Why is symmetry important ?

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Chemical Shapes & Polarity

Chemical Shapes & Polarity. Here are some basic compounds that you see everyday. Do you know what they are? As you can see, even though they are made of the same elements (carbon and hydrogen), they have very different shapes. This is due to the way the atoms bond to each other.

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Chapter 7 Analgesics and Anesthetics

Chapter 7 Analgesics and Anesthetics. Part 1 Analgesics 1) Types of Pain (acute, chronic). Somatic( ???. Superficial? Skin ? Deep ?Conn. tissues Bones Joints Muscles?. Neuropathic? ???. Visceral? ??? Kidney stones Gastric torsion Angina etc. ??????????? ????????????????????????.

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Interatomic Bonding

Interatomic Bonding. Bonding Forces and Energies Equilibrium atomic spacing Minimization of bonding energy Embedded Atom Method (EAM) Types of Bonding Ionic Covalent Secondary Metallic. Bonding Forces and Energy. Interatomic Forces attractive forces (F a ) repulsive forces (F r )

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Chapter 2

Chapter 2. Elements, bonding, simple structures en ionic radii. Content. Bonding Metallic bonding Van der Waals b onding Ionic bonding Covalent bonding Ionic radii Radius ratio and coordination polyhedra Some general rules concerning the ionic structures. Introduction.

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Enzymes In Depth

Enzymes In Depth. With pH!. pH. Enzymes. Globular proteins Built from amino acids that have acidic and basic characteristics Amino acids have both a carboxylic acid (COOH) and amine (NH3) groups. Enzymes. R-COOH ?? C-COO -1 + H+1 R-NH3 +1 ?? R-NH2 + H+1 Ionic bonds

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