Answer:
The atomic number of a chemical element (atomic species) is the number of protons in the nucleus of its atom. This number is conventionally denoted by Z and is by definition a non-negative natural number. For instance, the element carbon is characterized by Z = 6 and the element phosphorus by Z = 15. A proton having a positive charge e (the elementary charge), the atom of a chemical element has nuclear charge Ze.
Explanation:
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