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A solid characterized by a regular, ordered arrangement of particles.

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Flash Point

The temperature at which a liquid will yield enough flamable vapour to ignite. There are various recognized industrial testing methods, therefore the method used must be stated.

Autoionization

An ionization reaction between identical molecules.

Acyl Group

Compound derived from a carbonic acid by replacing the --OH group with a halogen (X), usually --Cl, general formula is O R--C--X.

Standard Entropy

The absolute entropy of a substance in its standard state at 298 K.

Homogeneous Mixture

A mixture which has uniform composition and properties throughout.

Electronic Transition

The transfer of an electron from one energy level to another.

Turning iron nail into copper nail

This simple chemical experiment shows the so-called process of copper plating of metal products. Copper has the ability to deposit on a metal surface.

Pauli Exclusion Principle

No two electrons in the same atom may have identical sets of four quantum numbers.

Specific Gravity

The ratio of the density of a substance to the density of water.

Dilution

Process of reducing the concentration of a solute in solution, usually simply by mixing with more solvent.