electron theory of valency

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• Valency interaction formula — The Valency Interaction Formula, or VIF is a method for drawing molecular structural formulas based in quantum mechanics. The mathematical basis for VIF was formulated by Oktay Sinanoglu in a series of five papers published in 1984. [ Sinanoğlu,… …   Wikipedia

• VSEPR theory — Valence shell electron pair repulsion (VSEPR) theory is a model in chemistry used to predict the shape of individual molecules based upon the extent of electron pair electrostatic repulsion.[1] It is also named Gillespie–Nyholm theory after its… …   Wikipedia

• Chemical bond — A chemical bond is an attraction between atoms that allows the formation of chemical substances that contain two or more atoms. The bond is caused by the electromagnetic force attraction between opposite charges, either between electrons and… …   Wikipedia

• Davy Medal — Robert Bunsen and Gustav Kirchhoff, the first recipients of the award. They were awarded the medal for their researches discoveries in spectrum analysis . The Davy Medal is awarded by the Royal Society of London for an out …   Wikipedia

• Inert pair effect — The term inert pair effect is often used in relation to the increasing stability of oxidation states that are 2 less than the group valency for the heavier elements of groups 13, 14, 15 and 16. The term inert pair was first proposed by Sidgwick… …   Wikipedia

• Oktay Sinanoğlu — Born 2 August 1934(1934 08 02) Bari, Italy Nationality Turkish …   Wikipedia

• John Lennard-Jones — Lennard Jones is well known among scientists for his work on molecular structure, valency and intermolecular forces. Much research in these areas over several decades grew from a paper he published in 1929. His theories of liquids and of surface… …   Wikipedia

• Sulfate — In inorganic chemistry, a sulfate (IUPAC recommended spelling; also sulphate in British English) is a salt of sulfuric acid.Chemical propertiesThe sulfate ion is a polyatomic anion with the empirical formula SO42− and a molecular mass of 96.06… …   Wikipedia

• Molecular structure — The molecular structure of a substance is described by the combination of nuclei and electrons that comprise its constitute molecules. This includes the molecular geometry (essentially the arrangement, in space, of the equilibrium positions of… …   Wikipedia

• Valence (chemistry) — For other uses, see Valence (disambiguation). In chemistry, valence, also known as valency or valence number, is a measure of the number of bonds formed by an atom of a given element. Valence can be defined as the number of valence bonds[1] a… …   Wikipedia

• reaction mechanism — Introduction       in chemical reactions (chemical reaction), the detailed processes by which chemical substances are transformed into other substances. The reactions themselves may involve the interactions of atoms (atom), molecules (molecule),… …   Universalium