What Is Sub Atomic Theory?


Diego Sanchez

Sub Atomic Theory refers to the study of particles that are smaller than atoms. The theory suggests that everything around us, from the air we breathe to the ground beneath our feet, is made up of tiny particles that are too small to see with the naked eye.

What is an atom?

Before we dive into sub-atomic theory, let’s first understand what an atom is. An atom is the basic unit of matter and consists of three types of particles: protons, neutrons, and electrons.

Protons have a positive charge while electrons have a negative charge, and neutrons have no charge at all. The number of protons in an atom determines what element it is.

What are subatomic particles?

Subatomic particles are particles that make up an atom. There are three types of subatomic particles: protons, neutrons, and electrons. Protons and neutrons are found in the nucleus or center of the atom while electrons orbit around the nucleus.

The discovery of subatomic particles:

The discovery of subatomic particles began in the late 1800s when J.J. Thomson discovered electrons using a cathode ray tube experiment. In 1911, Ernest Rutherford conducted a gold foil experiment which led to the discovery of protons in the nucleus.

It wasn’t until 1932 that James Chadwick discovered neutrons through his experiments on atomic nuclei. With these three subatomic particles identified, scientists were able to begin studying their properties and behavior.

Properties and behaviors:

Electrons have a negative charge and are much smaller than both protons and neutrons. They orbit around the nucleus in shells or energy levels.

Protons have a positive charge and are located in the nucleus along with neutrons which have no charge at all.

Neutrons play an important role in the stability of the nucleus. Without neutrons, the nucleus would be unstable and could undergo radioactive decay.

Subatomic particles and their impact:

The study of subatomic particles has had a significant impact on our understanding of the world around us. It has led to the development of technologies such as nuclear power and medical imaging.

Subatomic particles also play a crucial role in particle physics, which studies the fundamental particles that make up our universe. Scientists continue to study subatomic particles in hopes of unlocking new discoveries and advancing our understanding of the universe.


In conclusion, subatomic theory is an important field of study that has helped us understand the building blocks of matter. With continued research, we can expect to gain even more insights into this fascinating and complex area of science.