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A substance of two or more elements in fixed proportions. Compounds can be decomposed into their constituent elements.

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A compound containing an alkyl group bonded to a benzene ring.

Crystal Field Theory

Theory of bonding in transition metal complexes in which ligands and metal ions are treated as point charges, a purely ionic model, ligand point charges represent the crystal (electrical) field perturbing the metal?s d orbitals containing nonbonding electrons.


Compound in which an oxygen atom is bonded to two alkyl or two aryl groups, or one alkyl and one aryl group.


Combination of symbols that indicates the chemical composition of a substance.


Differential Scanning Calorimetry (DSC)

A technique for measuring the temperature, direction, and magnitude of thermal transitions in a sample material by heating/cooling and comparing the amount of energy required to maintain its rate of temperature increase or decrease with an inert reference material under similar conditions.

Chemical Equilibrium

A state of dynamic balance in which the rates of forward and reverse reactions are equal, there is no net change in concentrations of reactants or products while a system is at equilibrium.

Beta Particle

Electron emitted from the nucleus when a neuton decays to a proton and an electron.


Density is the ratio b/w Mass and Volume: D=M/V

Periodic Table of Elements

An arrangement of elements in order of increasing atomic numbers that also emphasizes periodicity.


Discovered : at both Berkeley, California, USA, and Dubna, near Moscow, Russia in 1970. Description:A highly radioactive metal which does not occur naturally, and of which only a few atoms have ever been made. It is of research interest only. Origin:The element is named after the Russian town of Dubna.