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A vertical column in the periodic table, also called a family.

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Mother Nuclide

Nuclide that undergoes nuclear decay.

Molarity

Number of moles of solute per litre of solution.

Dissociation

In aqueous solution, the process in which a solid ionic compound separates into its ions.

Solubility Product Constant

Equilibrium constant that applies to the dissolution of a slightly soluble compound.

Dimer

Molecule formed by combination of two smaller (identical) molecules.

Dubnium

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.

Boiling Point Elevation

The increase in the boiling point of a solvent caused by the dissolution of a nonvolatile solute.

Outer Orbital Complex

Valence bond designation for a complex in which the metal ion utilizes d orbitals in the outermost (occupied) shell in hybridization.

Physical Change

A change in which a substance changes from one physical state to another but no substances with different composition are formed. Example Gas to Liquid - Solid.

 

Explosive limits

The range of concentrations over which a flammable vapour mixed with proper ratios of air will ignite or explode if a source of ignitions is provided.