Question

What development led to the realization that Dalton's atomic model was too simple?

A. Scientists discovered that all matter is made up of atoms.

B. Scientists found that smaller particles within an atom existed.

C. Scientists found that atoms are made of smaller particles called cells.

D. Scientists discovered that electrons orbit inside of a nucleus.

Answer 1

Step-by-step explanation:

B. Scientists found that smaller particles within an atom existed.