elementary particle
fundamental particle

There are no cases known of fundamental particles or fields in this family.

The theory assumes that a certain fundamental particle in nature has no other force or energy except gravity.

Some scientists begin to hypothesize the possible existence of another fundamental particle.

From these collisions, physicists hope to understand better the fundamental particles and forces of the universe.

Cornell scientists have researched the fundamental particles of nature for more than 70 years.

"We appear to have positively identified the fundamental particle of time."

The fundamental particles of which matter is made are arranged in generations.

But I don't have any coherent idea of what a fundamental particle is like.

It is one of the 17 fundamental particles in the Standard Model.

Because it does not break apart, the electron is called a fundamental particle.