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                                    What is atomic number , mass number , and atomic mass ? | 
                            
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AnswerΒ»  Atomic massis the weighted averagemassof anatomof an element based on the relative natural abundance of that element's isotopes. Themass numberis a count of the totalnumber of protons and neutrons in anatom's nucleus Theatomic numberuniquely identifies a chemical element. In an unchargedatom, theatomic numberis also equal to thenumberof electrons thank u ππ  | 
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