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    				| 1. | 
                                    Atic number of an atom depends upon | 
                            
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Answer»  Atomic number of an atom depends uponIts chemical BEHAVIOR is determined by the atomic number 2 (the number of PROTONS), which EQUALS the normal number of electrons; the stability of its nucleus (that is, its radioactivity) varies with its atomic weight (APPROXIMATELY equal to the number of protons and neutrons).  | 
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