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packing fraction definition

packing fraction

the ratio of the mass defect of an isotope to its mass number, equal to (M − A) ÷ A, where M is the atomic mass and A is the mass number: usually expressed as parts per 10,000

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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