Question

Scientists initially believed that the smallest particle of matter was the atom. Then, particles smaller than the atom were discovered.

What most likely contributed to the change in this theory?

new definition of theory
new technology
new generation of scientists
new way of thinking

Answer 1

The most likely factor that contributed to the change in the theory about the smallest particle of matter is **new technology**. Advances in tools and techniques, such as electron microscopes and particle accelerators, allowed scientists to explore and observe subatomic particles like protons, neutrons, and electrons, leading to a better understanding of atomic structure and the discovery of even smaller particles, such as quarks and leptons. These technological advancements made it possible to gather evidence and refine existing theories about the nature of matter.