... plane faces, each a rectangle, edges, and corners B) plane faces, each a square, 12 edges, and corners C) plane faces, each an equilateral triangle, edges, and corners D) plane faces, each an ... radius than their neutral atom, while have gained one or more electrons to acquire a negative charge and a larger radius than their neutral atom A) daughter isotopes, parent isotopes B) ... D) twelve 18) 19) An atom's mass number is 13 and its atomic number is How many neutrons are in its nucleus? A) B) C) 13 D) 19 19) 20) What is the name given to an atom that gains or loses...