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Of electrons, refers to bonding electrons that are distributed among more than two atoms that are bonded together, occurs in species that exhibit resonance.
The formation of a set of molecular orbitals that extend over more than two atoms, important in species that valence bond theory describes in terms of resonance.

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Cis-

The prefix used to indicate that groups are located on the same side of a bon about which rotation is restricted.

Electronic Geometry

The geometric arrangement of orbitals containing the shared and unshared electron pairs surrounding the central atom of a molecule or polyatomic ion.

Allotropic Modifications (Allotropes)

Different forms of the same element in the same physical state.

Dipole-dipole Interactions

Attractive interactions between polar molecules, that is, between molecules with permanent dipoles.

Distillate

The material in a distillation apparatus that is collected in the receiver.

 

Plasma

A physical state of matter which exists at extremely high temperatures in which all molecules are dissociated and most atoms are ionized.

Equation of State

An equation that describes the behavior of matter in a given state, the van der Waals equation describes the behavior of the gaseous state.

Heterogeneous Mixture

A mixture that does not have uniform composition and properties throughout.

Gel

Colloidal suspension of a solid dispersed in a liquid, a semirigid solid.

Detergent

A soap-like emulsifer that contains a sulfate, SO3 or a phosphate group instead of a carboxylate group.