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Pair of electrons involved in a covalent bond.

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Hydrolysis

The reaction of a substance with water or its ions.

Crystalline Solid

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

Valence Electrons

Outermost electrons of atoms, usually those involved in bonding.

Neutron

A neutral subatomic particle having a mass of 1.0087 amu.

Phase Diagram

Diagram that shows equilibrium temperature-pressure relationships for different phases of a substance.

Alcohol

Hydrocarbon derivative containing an --OH group attached to a carbon atom not in an aromatic ring. Alcohols are a class of organic compounds containing the hydroxyl group, OH, attached to a carbon atom.

Homonuclear

Consisting of only one element.

Molecular Orbital Theory

A theory of chemical bonding based upon the postulated existence of molecular orbitals.

Flammable

A liquid as defined by NFPD and DOT as having a flash point below 37.8°C (100°F).

Line Spectrum

An atomic emission or absorption spectrum.