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The temperature above which a gas cannot be liquefied, the temperature above which a substance cannot exhibit distinct gas and liquid phases.

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Hund's Rule

All orbitals of a given sublevel must be occupied by single electrons before pairing begins.

Amine

Derivatives of ammonia in which one or more hydrogen atoms have been replaced by organic groups.

Chemical Hygiene Plan (CHP)

A written program developed and implemented by an employer designating proceedures, equipment, personal protective equipment, and work practices that are capable of protecting employees from the health hazards presented by hazardous chemicals usid in that particular workplace.

S Orbital

A spherically symmetrical atomic orbital, one per energy level.

Electronic Geometry

The geometric arrangement of orbitals containing the shared and unshared electron pairs surrounding the central atom of a molecule or polyatomic ion.

Formula

Combination of symbols that indicates the chemical composition of a substance.

 

Osmosis

The process by which solvent molecules pass through a semipermable membrane from a dilute solution into a more concentrated solution.

 

Binary Compound

A compound consisting of two elements, may be ionic or covalent.

Periodic Table

An arrangement of elements in order of increasing atomic numbers that also emphasizes periodicity.

Bronsted-Lowry Acid

A proton donor.