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单词 neutron number
释义

WordReference Random House Unabridged Dictionary of American English © 2024
neutron num′ber, [Physics.]
  1. Physicsthe number of neutrons in the nucleus of an atom, equal to the mass number minus the atomic number of the atom. Symbol: N
  • 1950–55

Collins Concise English Dictionary © HarperCollins Publishers::
neutron number n
  1. the number of neutrons in the nucleus of an atom
    Symbol: N
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