Medical Dictionary

atomic number


atomic number

noun atomic num·ber \-ˈnəm-bər\

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
March 01, 2015
macaroni Hear it
Tube-shaped pasta or a fop or dandy
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