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Definition of Atomic number
1. Noun. The order of an element in Mendeleyev's table of the elements; equal to the number of protons in the nucleus or electrons in the neutral state of an atom of an element.
Definition of Atomic number
1. Noun. (physics chemistry) The number, equal to the number of protons in an atom that determines its chemical properties. Symbol: Z ¹
¹ Source: wiktionary.com
Medical Definition of Atomic number
1.