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Polymeric organosilicon compounds, contain individual or cross-linked Si-O chains or rings in which some oxygens of SiO4 tetrahedra are replaced by other groups.

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Positron

A Nuclear particle with the mass of an electron but opposite charge.

Electrophile

Positively charged or electron-deficient.

Derivative

A compound that can be imagined to arise from a partent compound by replacement of one atom with another atom or group of atoms. Used extensively in orgainic chemistry to assist in identifying compounds.

Alkali Metals

Metals of Group IA (Na, K, Rb).

Charle's Law

At constant pressure the volume occupied by a definite mass of gas is directly proportional to its absolute temperature.

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.

Coordination Number

In describing crystals, the number of nearest neighbours of an atom or ion. The number of donor atoms coordinated to a metal.

Saccharide

An organic compound containing a sugar or sugars.

Insulator

Poor electric and heat conductor.

Lewis Base

Any species that can make available a share in an electron pair.