Dictionary
atomic number
noun
Definition of ATOMIC NUMBER
: an experimentally determined number characteristic of a chemical element that represents the number of protons in the nucleus which in a neutral atom equals the number of electrons outside the nucleus and that determines the place of the element in the periodic table — see element table
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First Known Use of ATOMIC NUMBER
1821
Rhymes with ATOMIC NUMBER
Medical Dictionary
atomic number
noun atomic num·ber \-ˈnəm-bər\
Medical Definition of ATOMIC NUMBER
: an experimentally determined number characteristic of a chemical element that represents the number of protons in the nucleus which in a neutral atom equals the number of electrons outside the nucleus and that determines the place of the element in the periodic table—see element table
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