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Molecular orbital resulting from head-on overlap of two atomic orbitals.

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Extensive Property

A property that depends upon the amount of material in a sample.

Square Planar

A term used to describe molecules and polyatomic ions that have one atom in the center and four atoms at the corners of a square.

Photon

A packet of light or electromagnetic radiation, also called quantum of light.

 

Kinetic-molecular Theory

A theory, that attempts to explain macroscopic observations on gases in microscopic observations on gases in microscopic observations on gases in microscopic or molecular terms.

Activation Energy

Amount of energy that must be absorbed by reactants in their ground states to reach the transition state so that a reaction can occur. In other words, activation energy is the minimum energy required for a chemical reaction to occur.

Fat

Solid triester of glycerol and (mostly) saturated fatty acids.

Debye

The unit used to express dipole moments.

Compressed Gas

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

Half-Cell

Compartment in which the oxidation or reduction half-reaction occurs in a voltaic cell.

Square Planar Complex

Complex in which the metal is in the center of a square plane, with ligand donor atoms at each of the four corners.