As scientists have learned more about atoms, models of atoms have changed. One of the first atomic models was a
solid ball, such as a marble.
What are two limitations of using a marble to model an atom?
A. The model is much harder to see than a real atom.
B. The model does not move or behave like a real atom
C. The model does not show the true size of an atom
D. The model is not made of commonly available materials or
objects