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The strong nuclear force holds together the nucleus of an atom.

What is a strong nuclear force?

There are four forces in nature:

1. The Gravitational Force
2. The Electromagnetic Force
3. The Strong Nuclear Force
4. The Weak Nuclear Force

Among these forces, only a strong-nuclear is responsible for holding the nucleus together.

What is the nucleus consist of:

The nucleus of an atom consists of two big particles, which are protons and neutrons.

The protons have a positive charge, and the neutron has a no/zero.
From properties of charges, we know that, “like charges repel each other, and unlike charges attract each other”
So, now the question in mind arises: If, like charges repel each other, then how can the two or more protons live together inside the nucleus?

The answer to the question is: The strong nuclear force holds them together.

In the following paragraphs, I’d like to discuss the four forces in simple words so that you can understand them easily.

### The Gravitational force

The gravitational force is the only force of nature that is only attractive, that two objects or masses only attract each other and will never repel each other. We can call this attractive force, The gravitational force.

In the real sense, every object attracts another object, and this attraction is called Newton’s Universal Law of Gravitation.

The gravitational force between two objects directly depends upon their masses; that is, the greater the masses greater will be the gravitational force and vice versa. What is the reason why we do not feel this force in our daily life?

>The answer is simple: The gravitational force depends on the masses; that is why we do not feel this force in our daily life.

### The Electromagnetic Force

Electromagnetic is sometimes called the Lorentz Force.

This force tells us how two electrically charged particles interact with each other.

The electromagnetic force is the sum of two, which are the electric force and the magnetic force.

Both the electric and magnetic forces are the fundamental force of the universe.

The electric force exists between two charges, and the magnetic force exists between them when they are in motion.

The electric force will exist forever when then there are two charges, while magnetic force will present when they are in motion.

### The Strong Nuclear Force

The strong nuclear force is the fundamental force in nature. As its name suggests, it is the most strong force of nature.

This force holds fundamental particles such as protons and neutrons inside the nucleus.

This force is responsible for the process of nuclear fusion and fission.

Fusion occurs in the sun, and fission occurs in a nuclear reactor and the atomic bomb.

### The Weak Nuclear Force

The weak nuclear force is stronger than the gravitational force but weaker than the electric force and is effective at the range of 8-10 meters.

The weak nuclear force is the cause of interaction between subatomic particles and is responsible for the decay of atoms. The process of nuclear fission occurs due to the weak nuclear force.

#### Summary

• The Gravitational force keeps us on the ground and holds the stars close to each other.
• The electromagnetic force ensures bonding in chemistry.
• The weak nuclear force is the cause of the decay of the nucleus.
• The strong nuclear force holds protons and neutrons in the nucleus.
• The weak nuclear and electromagnetic forces are called the electroweak force.