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

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Hydrate

A solid compound that contains a definite percentage of bound water.

Radiation

High energy particles or rays emitted during the nuclear decay processes.

Functional Group

A group of atoms that represents a potential reaction site in an organic compound.

Lewis Acid

Any species that can accept a share in an electron pair.

Thermal Cracking

Decomposition by heating a substance in the presence of a catalyst and in the absence of air.

 

Dermal toxicity

Adverse health effects resulting from skin exposure ot a substance.

Acidic Salt

A salt containing an ionizable hydrogen atom. Acidic salt does not necessarily produce acidic solutions.

London Forces

Very weak and very short-range attractive forces between short-lived temporary (induced) dipoles, also called dispersion Forces.

Natural Radioactivity

Spontaneous decomposition of an atom.

Hybridization

Mixing a set of atomic orbitals to form a new set of atomic orbitals with the same total electron capacity and with properties and energies intermediate between those of the original unhybridized orbitals.