How is a model of an atom different from a real atom? a. a model of an atom is not as big as an actual atom. b. a model of an atom is the same as a real atom. c. a model of an atom is more complex than a real atom. d. model of an atom is not as small as an actual atom.

The option that would best contrast the real and the model atoms is letter "D. model of an atom is not as small as an actual atom". The size of an atom is said to be no more than 0.1 to 0.5 nanometers. The models are used to proper illustrate the atom's physical attributes. That is why, it needs to be bigger in size. 

Ithink that the answer is b