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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.

 

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Combustible

Classification of liquid substances that will burn on the basis of flash points. A combustible liquid means any liquid having a flash point at or above 37.8°C (100°F) but below 93.3°C (200°F), except any mixture having components with flash points of 93.3°C (200°F) or higher, the total of which makes up 99 percent or more of the total volume of the mixture.

Overlap

The interaction of orbitals on different atoms in the same region of space.

Fractional Distillation

The process in which a fractioning column is used in distillation apparatus to separate components of a liquid mixture that have different boiling points.

Homogeneous Equilibria

Equilibria involving only one species in a single phase. For example, all gases, all liquids or all solids.

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.

Enantiomer

One of the two mirror-image forms of an optically active molecule.

Dissociation

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

Anion

A negative ion, an atom or goup of atoms that has gained one or more electrons.

 

Alkaline Battery

A dry cell in which the electrolyte contains KOH.

Reducing Agent

The substance that reduces another substance and is oxidized.