P Chemistry Abbreviation

Pressure

The normal force exerted by a homogeneous liquid or gas, per unit of area, on the wall of its container. The force applied to a unit area of surface; measured in pascals (SI unit) or in dynes (cgs unit). The force per unit area acting on a surface. A force being exerted on part of a surface. When you stand, your feet put pressure on the ground.

Phosphorus

Element No. 15 of the periodic system; atomic weight 30.98. Non metallic element occurring in at least three allotropic forms; melting point 111 (degrees) F.; boiling point 536 (degrees) F.; specific gravity 1.82. In steels it is usually undesirable with limits set in most specifications. However, it is specified as an alloy in steel to prevent the sticking of light gage sheets; to a degree it strengthens low carbon steel; increases resistance to corrosion, and improves machinability in free cutting steels.

Particle

A piece of debris. Found in a fluid, small portion of matter

Peta-

Pico-

A prefix that divides a basic unit by one trillion (10-12). Prefix used in the SI system meaning "multiply by 10-12". For example, 3 pm means 3× 10-12meters. Pico- prefix Denotes one trillionth (10–12), or, in the Brit-ish numbering system, one million millionth.

Phenolic

A resin or plastic, usually thermosetting, made by condensation of a phenol with an aldehyde and used for molding, insulating, coatings and adhesives. A synthetic resin used in the manufacture of some industrial finishes. The generic name for phenolformaldehyde thermosetting plastic that's molded or cast. A type of resin made from a condensation reaction of phenols and aldehydes. Resultant films have a high degree of chemical resistance with limited flexibility properties. 

Proton

The positively charged particle in the nucleus of an atom.