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Hydrocarbon derivative containing an [OH] group bound to an aromatic raing.

 

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Nitrogenases

A class of enzymes found in bacteria within root nodules in some plants, which catalyze reactions by which N2 molecules from the air are converted to ammonia.

 

Ligand

A Lewis base in a coordination compound.

Melting Point

The temperature at which liquid and solid coexist in equilibrium, also the freezing point.

Amine Complexes

Complex species that contain ammonia molecules bonded to metal ions.

Metallic Bonding

Bonding within metals due to the electrical attraction of positively charges metal ions for mobile electrons that belong to the crystal as a whole.

Nitrogen Cycle

The complex series of reactions by which nitrogen is slowly but continually recycled in the atmosphere, lithosphere and hydrosphere.

 

Vapor Pressure

The particle pressure of a vapor at the surface of its parent liquid.

Condensed States

The solid and liquid states.

Explosive limits

The range of concentrations over which a flammable vapour mixed with proper ratios of air will ignite or explode if a source of ignitions is provided.

Artificial Transmutation

An artificially induced nuclear reaction caused by the bombardment of a nucleus with subatomic particiles or small nucei.

Mass Deficiency

The amount of matter that would be converted into energy if an atom were formed from constituent particles.

Hydrophilic Colloids

Colloidal particles that repel water molecules.

Stoichiometry

Description of the quantitative relationships among elements and compounds as they undergo chemical changes.

Delocalization

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.

Debye

The unit used to express dipole moments.

Leclanche Cell

A common type of dry cell.

Collision Theory

Theory of reaction rates that states that effective collisions between reactant molecules must occur in order for the reaction to occur.

Combination Reaction

Reaction in which two substances (elements or compounds) combine to form one compound.

Dimer

Molecule formed by combination of two smaller (identical) molecules.

Pairing

A favourable interaction of two electrons with opposite m , values in the same orbital.