Atomic number

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  • (chemistry)
  1. Integral number of protons in the nucleus; defines the identity of element.
  2. The number of positively charged protons in the nucleus of an atom.
    Source: U.S. Nuclear Regulatory Commission
  • (geology)
  1. Number of positive charges on nucleus of an atom; number of protons in nucleus.
    Source: Leet, L. Don. 1982. Physical Geology, 6th Edition. Englewood Cliffs, NJ: Prentice-Hall
  2. The number of protons in the nucleus of an atom. See also: atomic weight
    Source: Dictionary of Mining, Mineral, and Related Terms


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