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level: Level 1 DIELECTRIC CONSTANT AND INDUCED POLARIZATION

Questions and Answers List

level questions: Level 1 DIELECTRIC CONSTANT AND INDUCED POLARIZATION

Question	Answer
It is the presence and flow of electric charge; a form of energy that comes in positive and negative forms	• Electricity
It is an electrical insulating material that can be polarized by an applied electric field • It is a non-conducting substance	• Dielectric material (dieletric)
What are the two types of dielectric?	• Polar • Nonpolar molecules
It is the ability for a molecule to be polarized. It is a property of matter; From a neutral becomes positive or negative.	• Polarizability
It is a measure of solvent’s efficiency for separating the electrolytes into the ions	• Dielectric constant
Solvents with high constants results to	• Dissociation of the electrolytes • (Since it is an insulator, it will break down electrolytes)
Solvents of low dielectric constant results to	• Ion pairing
When a dielectric is placed in an electric field, the molecule gains the dipole moment (positive and negative charge); electric charges shift from their average equilibrium positions	• Dielectric polarization
Characteristics of Electrically Charged Objects	• Like charges repel one another • Unlike charges attract each other • A neutral object has no net charge • Dipoles do not have a net charge • Placing a molecule in an electric field is one way to induce a dipole
separaton of two opposing charges over a distance	dipole
• A molecule with a permanent dipole moment is called	polar molecule
Example of molecule that posses a permanent dipole	H2O
Importance of dipole interactions	• Essential role in solubility phenomena • For drug-receptor binding, to enchance the pharmacologic effect • For solids of polar molecules, it contributes to the crystalline arrangement and overall structural nature of the solid
• Refers to the waves of electromagnetic field, propagating (radiating) through space carrying electromagnetic radiant energy.	ELECTROMAGNETRIC RADIATION (EMR)
ELECTROMAGNETRIC RADIATION includes	radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, gamma radiations