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The ratio of the change in length or volumen of a body to the original lengthor volume for a unit change in temperature.

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Ideal Solution

A solution that obeys Raoult's Law exactly.

Ionic Compounds

Compounds containing predominantly ionic bonding.

Photoelectric Effect

Emission of an electron from the surface of a metal caused by impinging electromagnetic radiation of certain minimum energy, current increases with increasing intensity of radiation.

 

Chemical Equation

Description of a chemical reaction by placing the formulas of the reactants on the left and the formulas of products on the right of an arrow.

Ternary Compound

A compound consisting of three elements, may be ionic or covalent.

Amphoterism

The ability to react with both acids and bases.Ability of substance to act as either an acid or a base.

DP number

The degree of polymerization, the average number of monomer units per polymer unit.

Sigma Bonds

Bonds resulting from the head-on overlap of atomic orbitals, in which the region of electron sharing is along and (cylindrically) symmetrical to the imaginary line connecting the bonded atoms.

Optical Isomers

Stereoisomers that differ only by being nonsuperimposable mirror images of each other, like right and left hands, also called enantiomers.

Coordinate Covalent Bond

A covalent bond in which both shared electrons are donated by the same atom, a bond between a Lewis base and a Lewis acid.