MOLECULAR ORBITAL THEORY

detailed explanation of how electrons are distributed in stable molecules. In the simpler valence theory of the chemical bond, each atom in a molecule is assumed to retain its own electrons. Even when electrons are shared, as in the covalent bond, it is possible to identify which electron came from which atom. The molecular orbital theory, however, treats each electron as associated with the molecule as a whole. Just as a free atom has certain allowed electron orbits and energies, each molecule has its own allowed molecular orbitals. The orbitals give the probability of finding the electron at any point in space. Each orbital can hold a maximum of two valence electrons and the structure of the molecule is built up by filling the lowest energy orbitals first. The calculations involved are extremely complex, and only the simplest molecules can be treated exactly.

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The Columbia Encyclopedia, Sixth Edition Copyright© 2004, Columbia University Press. Licensed from Lernout & Hauspie Speech Products N.V. All rights reserved.

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Questia Books and Articles on: Molecular Orbital Theory
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books on: Molecular Orbital Theory  - 62 results

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1.
The Touchstone of Life: Molecular Information, Cell Communication, and the Foundations of Life
Book by Werner R. Loewenstein; Oxford University Press, 1999
Subjects: Cell Interaction, Cellular Signal Transduction, Information Theory In Biology
...protein mold for sequential molecular interaction. A schematic...each other for electron-orbital interaction. As a final result...gain of information in this molecular growth. thetase presumably...the gray eminence behind all molecular information affairs. But...
2.
Encyclopaedic Dictionary of Physics: General, Nuclear, Solid State, Molecular, Chemical, Metal and Vacuum Physics, Astronomy, Geophysics, Biophysics, and Related Subjects - Vol. 2
Book by J. Thewlis, R. C. Glass, D. J. Hughes, A. R. Meetham; Pergamon Press, 1962
Subjects: Physics--Dictionaries
...Organic reactivity, theories of. HOMONUCLEAR...covalent bond. In the molecular orbital theory of valency a homopolar...which the bonding molecular orbital is of the form A...and B are atomic orbitals on the atoms A and...
3.
Phenomena, Atoms and Molecules: An Attempt to Interpret Phenomena in Terms of Mechanisms or Atomic and Molecular Interactions
Book by Irving Langmuir; Philosophical Library, 1950
Subjects: Science
...In the past in the kinetic theory it has been usual to take into...whereas by the reasoning of Borns theory the repulsive forces, being...Thus we cannot regard Borns theory as one that throws any light...depends essentially on the orbital motions of the electrons within...
4.
The Quantum Classical Theory
Book by Gert D. Billing; Oxford University Press, 2003
Subjects: Molecular Dynamics, Quantum Chemistry
...hindered rotors rather than vibrators 162. A hybrid theory which quantizes some of the vibrational modes...Thus Pnn, depends on the initial rotational and orbital angular momenta as well as molecular orientation angles and angles conjugate to j...
5.
Complexity: Theory and Applications
Book by Nam P. Suh; Oxford University Press, 2005
Subjects: Axiomatic Set Theory, Computational Complexity, Design, Industrial--Methodology
...an object such as an orbital space plane or in understanding...of our body and the molecular behavior of proteins...problems. The complexity theory presented in this book...complexity. The complexity theory presented in this book differs from other theories on complexity. According to this theory, complexity must be...
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journal articles on: Molecular Orbital Theory  - 33 results

       More journal Results: 1-10 11-20 21-30 31-33 >>  
 
1.
A Molecular Structural Analysis of Disaggregated Corporations
Journal article by Sekhar Chattopadhyay, Danny S. K Chan, John P. T Mo; International Journal of Management, Vol. 28, 2011
Subjects: Business ownership, China, Competition, Molecular chemistry, Recessions, Studies
...shells in the molecular organization on...project is. The orbital bands are where...already established molecular theory lie in its inability...different parts of the molecular organization and...people in different orbital bands that are...
2.
Olfaction
Journal article by Richard L. Doty; Annual Review of Psychology, 2001
Subjects: Aging--Physiological aspects, Molecular biology--Research, Pheromones--Research, Psychophysics--Research, Smell--Research
...receptor accepts a range of molecular entities, and that coding...Although their general hierarchy theory was not supported, these investigators...pioneering study suggests that orbital regions are involved in judgments...express immunoreactivity to molecular markers characteristic of neurons...
3.
Is Homeopathy Possible?
Journal article by Lionel R. Milgrom; Perspectives in Public Health, Vol. 126, 2006
Subjects: Alternative medicine, Homeopathic medicine, Medicine, Theory
...from within the quantum theory of physics that, with...atomic through to the molecular domains. However...homeopathic process: from the molecular (created during production...entanglement, the residual molecular entanglement built into...to a testable working theory for the therapeutic...
4.
Model-Based Inquiry and School Science: Creating Connections
Journal article by Cynthia Passmore, Jim Stewart, Jennifer Cartier; School Science and Mathematics, Vol. 109, 2009
Subjects: Inquiry (Theory of knowledge)--Educational aspects, Learning--Evaluation, Learning--Models, Science education--Curricula, Science education--Methods, Sciences education--Curricula, Sciences education--Methods, Teaching models--Evaluation
...together to form scientific theories (Giere, 1988). For example, evolutionary theory is comprised of a set...astronomy, and kinetic molecular theory. In addition, middle...out of the Earth-sun orbital plane. At this point...
5.
Large Effects from Small Exposures. I. Mechanisms for Endocrine-Disrupting Chemicals with Estrogenic Activity
Journal article by Wade V. Welshons, Kristina A. Thayer, Barbara M. Judy, Julia A. Taylor, Edward M. Curran, Frederick S. Vom Saal; Environmental Health Perspectives, Vol. 111, 2003
...acknowledged. We will initially discuss the theory behind the error that occurs on the basis...51.) Kier LB. Molecular Orbital Theory in Drug Research. New York:Academic...Stephenson RP. A modification of receptor theory. Br J Pharmacol 11:379-393 (1956...
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magazine articles on: Molecular Orbital Theory  - 4 results

 
 
1.
Divine Secrets of the Ya-ya Universe
Magazine article by David Naiditch; Skeptic, Vol. 10, 2003
Subjects: Computer programming, Mathematics, Scientists, Wolfram, Stephen
...symmetry. Such free-floating theories, Weinberg argues, are not...universal laws, free-floating theories "may or may not apply to...justify applying one of these theories in a given context," continues...to deduce the axioms of the theory in that context from the really...sweep equal areas in their orbital ellipse in equal times-is...
2.
Mining for Dark Matter
Magazine article by Brooke Borel; Popular Science, Vol. 278, January 2011
Subjects: Astronomy, Copper, Dark matter, Mining, Physicists, Titanium
...are skeptical about the WIMP theory, and in some cases about the...are simply the best current theory: "A glib way to say it is...pumps and $10,000 worth of orbital weld fittings. Akerib estimates...phenomenon supported by particle theory). Physicists at the Large...
3.
Big Science!
Magazine article by Gregory Mone, Brooke Borel, Katherine Bagley, Jennifer Abbasi; Popular Science, Vol. 279, August 2011
Subjects: Atoms & subatomic particles, Budgets, Climate change, Cosmic rays, Neptune, Quarks, Science, Sensors, Telescopes
...can sort substances at the molecular level. Down the line, we...will fi nd some material or theory based on data collected by...materials to reveal their atomic, molecular and electronic properties...INTERNATIONAL SPACE STATION AN ORBITAL LABORATORY It takes $2 billion...
4.
Invisible, Incredible, Infrared
Magazine article by Steve Voynick; World and I, Vol. 15, June 2000
Subjects: Infrared astronomy--Research, Infrared radiation--Research
...in the submicroscopic world of quantum theory. The various types of electromagnetic...of the infrared band coincide with the molecular vibration frequencies of different molecules...would take years to accumulate. The first orbital hyperspectral imager will be launched...


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encyclopedia articles on: Molecular Orbital Theory  - 4 results

 
 
1.
Molecular Orbital Theory
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
MOLECULAR ORBITAL THEORY detailed explanation of how electrons...electron came from which atom. The molecular orbital theory, however, treats each...each molecule has its own allowed molecular orbitals. The orbitals give the probability...
2.
Chemistry
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
...elements. Electrochemical theories of chemical combinations...triumph of the new theory was the discovery of...opened the way to modern theories of organic chemistry...ionization equilibrium theory of S. A. Arrhenius...marks the beginning of molecular biology. At the end...valency, and molecular orbitals (see molecular orbital theory ). Transmutation...
3.
Chemical Bond
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
...Pauli exclusion principle . The molecular orbital theory was developed to predict the...electron density in various molecular structures. The American chemist...when more than one reasonable molecular structure is possible: the...
4.
Spectrum
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
...provided by the quantum theory . In his 1913 model of...orbits in which their orbital angular momentum is an...Pfund series. The Bohr theory was not as successful...developments of the quantum theory showed that all aspects of atomic and molecular spectra can be explained...


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