The invention of the allows scientists to learn about cells.

answer : a model is often used to explain and make things easier to understand when any scientific topic needs to be demonstrated and explained.

as in this case where a scientist wants to use a model to present the results of his detailed scientific investigation. he should do it as it will him to make the audience understand the concept in a much better way. also, it can be changed according to new scientific understandings.

the electron configuration that you gave me has 16 electrons ergo it has 16 protons ergo it is the element sulfur.