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What is the atomic number of an atom?
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What is the atomic number of an atom?

User Bewildered
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it identifies a chemical element, and is the charge number of the nucleus. for example, Hydrogen has 1... Oxygen has 8... Lithium has 3... etc
User Valerio Bozz
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The atomic number or proton number (symbol Z) of a chemical element is the number of protons found in the nucleus of every atom of that element.

User Tenders McChiken
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