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An algebraic increase in the oxidation number, may correspond to a loss of electrons.

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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.

S Orbital

A spherically symmetrical atomic orbital, one per energy level.

Group

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

Evaporation Rate

The rate at which a particular substance will vapourize (evaporate) when compared to the rate of a known substance such as ethyl ether. This term is especially useful for health and fire-hazard considerations.

Compressed Gas

A gas or mixture of gases having, in a container an absolute pressure exceeding 40 psi at 21.1°C (70°F)

Leclanche Cell

A common type of dry cell.

Heterogeneous Equilibria

Equilibria involving species in more than one phase.

A brief history of dyeing fabrics

 Dyeing fabrics is giving the fibers a homogeneous color that has a certain degree of strength. The methods of dyeing are very diverse, depending on the properties of the dyes and the dyed fibers.

Integrated Rate Equation

An equation giving the concentration of a reactant remaining after a specified time, has different mathematical form for different orders of reactants.

Amphoterism

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