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Elements 58 to 71 (after lanthanum).

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Le Chatelier's Principle

States that a system at equilibrium, or striving to attain equilibrium, responds in such a way as to counteract any stress placed upon it.
If a stress (change of conditions) is applied to a system at equilibrium, the system shifts in the direction that reduces stress.

Chemical Periodicity

The variations in properties of elements with their position in the periodic table.

Density

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

Aromatic Hydrocarbons

Benzene and its derivatives.

Geometrical Isomers

Compounds with different arrangements of groups on either side of a bond with restricted rotation, such as a double bond or a single bond in a ring, for example cis-trans isomers of certain alkenes. Stereoisomers that are not mirror images of each other, also known as position isomers.

Functional Group

A group of atoms that represents a potential reaction site in an organic compound.

Formula Unit

The smallest repeating unit of a substance. The molecule for nonionic substances

Titration

A Procedure in which one solution is added to another solution until the chemical reaction between the two solutes is complete, the concentration of one solution is known and that of the other is unknown.

 

Low Spin Complex

Crystal field designation for an inner orbital complex, contains electrons paired t2g orbitals before eg orbitals are occupied in octahedral complexes.

D-Orbitals

Beginning in the third energy level, aset of five degenerate orbitals per energy level, higher in energy than s and p orbitals of the same energy level.