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Spectrum associated with emission of electromagnetic radiation by atoms (or other species) resulting from electronic transitions from higher to lower energy states.

 

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Dynamic Equilibrium

An equilibrium in which processes occur continuously, with no net change. When two (or more) processes occur at the same rate so that no net change occurs.

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.

Acid Anhydride

Compound produced by dehydration of a carbonic acid. General formula is R--C--O--C--R. Chemical compound that reacts with water to form an acid and are usually oxides of nonmetallic elements.

Thermodynamics

The study of the energy transfers accompanying physical and chemical processes.

Mass Number

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

Stoichiometry

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

Critical Mass

The minimum mass of a particular fissionable nuclide in a given volume required to sustain a nuclear chain reaction.

Ore

A natural deposit containing a mineral of an element to be extracted.

Phenol

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

 

Coordinate Covalent Bond

A covalent bond in which both shared electrons are donated by the same atom, a bond between a Lewis base and a Lewis acid.