Question

why are atoms sometimes shown using models like the one in this picture?
a. because electrons move in circular orbits
b. because the nucleus is about half the size of the electron cloud
c. because it is a convenient way to show the parts of an atom

Explanation:

Atomic models are simplified representations to help visualize and understand the structure of atoms and their components. They are not exact depictions (electrons don't move in perfect circular orbits as in some models and the nucleus - electron - cloud size ratio is not as simply described as in option B). Option C is correct as models are a convenient way to show parts of an atom.

Answer:

C. because it is a convenient way to show the parts of an atom