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A plant extract that has a distinctive odour or flavour.

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Electronegativity

A measure of the relative tendency of an atom to attract electrons to itself when chemically combined with another atom.

Hydration Energy

The energy change accompanying the hydration of a mole of gase and ions.

Copper

Discovered : known to ancient civilisations
Origin : The name is derived from 'Cuprum', the Latin name for Cyprus.

Crystalline Solid

A solid characterized by a regular, ordered arrangement of particles.

Critical Point

The combination of critical temperature and critical pressure of a substance.

Radioactivity

The spontaneous disintegration of atomic nuclei.

Effective Collisons

Collision between molecules resulting in a reaction, one in which the molecules collide with proper relative orientations and sufficient energy to react.

 

Mass Number

The sum of the numbers of protons and neutrons in an atom, an integer.

Basic Anhydride

The oxide of a metal that reacts with water to form a base.

Second Law of Thermodynamics

The universe tends toward a state of greater diorder in spontaneous processes.