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                              Q:
                           
                           
                                                      | A) numbers of neutrons | B) numbers of electrons | 
| C) numbers of protons | D) atomic numbers | 
                              Answer:   A) numbers of neutrons
                              
                                                            
                              
Explanation:
                               
                           
                           Explanation:
Isotopes are variations of an element that have the same charge as the original element, but a different mass, which is caused by either more/less neutrons in the nucleus.
 
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