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neutron number

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noun Physics.
  1. the number of neutrons in the nucleus of an atom, equal to the mass number minus the atomic number of the atom. Symbol: N
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Origin of neutron number

First recorded in 1950–55
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for neutron number

neutron number

noun
  1. the number of neutrons in the nucleus of an atomSymbol: N
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012