the essentials of chemistry

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• The China Study (book) — The China Study: Startling Implications for Diet, Weight Loss, and Long Term Health   …   Wikipedia

• Computational chemistry — is a branch of chemistry that uses principles of computer science to assist in solving chemical problems. It uses the results of theoretical chemistry, incorporated into efficient computer programs, to calculate the structures and properties of… …   Wikipedia

• Ab initio quantum chemistry methods — are computational chemistry methods based on quantum chemistry.[1] The term ab initio was first used in quantum chemistry by Robert Parr and coworkers, including David Craig in a semiempirical study on the excited states of benzene.[2][3] The… …   Wikipedia

• Semi-empirical quantum chemistry method — Semi empirical quantum chemistry methods are based on the Hartree Fock formalism, but make many approximations and obtain some parameters from empirical data. They are very important in computational chemistry for treating large molecules where… …   Wikipedia

• Basis set (chemistry) — A basis set in chemistry is a set of functions used to create the molecular orbitals, which are expanded as a linear combination of such functions with the weights or coefficients to be determined. Usually these functions are atomic orbitals, in… …   Wikipedia

• Quantum chemistry composite methods — are ab initio post Hartree Fock methods in computational chemistry that aim for high accuracy by combining the results of several calculations. They combine methods with a high level of theory and a small basis set with methods that employ lower… …   Wikipedia

• Criticism of the Quran — Part of a series on the Quran …   Wikipedia

• Socrates and the beginnings of moral philosophy — Hugh H.Benson INTRODUCTION Cicero in Tusculan Disputations famously tells us that Socrates first called philosophy down from the sky, set it in cities and even introduced it into homes, and compelled it to consider life and morals, good and evil …   History of philosophy

• Entropy (energy dispersal) — The thermodynamic concept of entropy can be described qualitatively as a measure of energy dispersal (energy distribution) at a specific temperature. Changes in entropy can be quantitatively related to the distribution or the spreading out of the …   Wikipedia

• chemicalize.org — The startpage of chemicalize.org Initial release January 11, 2009
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• Orthogonality — The line segments AB and CD are orthogonal to each other. Orthogonality occurs when two things can vary independently, they are uncorrelated, or they are perpendicular. Contents 1 Mathematics …   Wikipedia