atomic number
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
From the M-W Editors
1913
First Known Use of atomic number
1913
Medical Dictionary
atomic number
playMedical 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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