Difference Between Nuclear Fission and Nuclear Fusion

The harnessed nuclear energy is released in nuclear reactions. There are two types of nuclear reactions called nuclear fission and nuclear fusion. Nuclear fission and fusion involve the disintegration and combination of the elemental nucleus. In the case of nuclear fission, an atom divides into two or smaller or lighter atoms. Nuclear fusion occurs when two or more atoms join or fuse together to form a large or heavy atom.

Nuclear Fission and Fusion
Fusion occurs in the sun where the atoms of(isotopes of hydrogen, Hydrogen-3, and Hydrogen-2) Deuterium and Tritium combine in a huge pressure atmosphere with extremely high temperatures to produce an output in the form of a neutron and an isotope of Helium. Also, the amount of energy released in fusion is way greater than the energy produced by fission. The difference between nuclear fission and fusion is provided here so that learners can understand the concept more effectively.

Difference Between Nuclear Fission and Nuclear Fusion

The table above would have given you a clear idea about how the two terms nuclear fission and fusion vary from one another.Β You may want to read more differences like this by clicking on the links given below:

A nuclear reactor is an apparatus that produces and controls the energy that is released from nuclear fission reactions. The energy released from the controlled nuclear fission reactions is harnessed as heat and is used to produce steam. The steam produced is used to drive the turbines, which in turn produce electricity. The video below clearly explains the working of a nuclear reactor.

For more articles on interesting topics like this visit BYJU’S.

Nuclear Fusion vs Fission
Nuclear Fusion
Nuclear Fission
Fusion would be defined as the joining of two or more small atoms to form a large atom.
Fission would be defined as the division of a single atom into multiple atoms of small size.
The necessity of Energy
A massive amount of energy is required to combine small atoms to form a large atom.
Requires less energy to divide atoms into two or more ones.
The release of Energy
The release of energy during fusion is way higher than that of the fission reaction.
The amount of energy released in fission is much lower than the energy released during fusion.
Production/Usage of energy
Experiments in power plants use this technology.
The energy produced in nuclear power plants uses this technology.
Natural Reactions
Takes place in stars and the Sun that is natural forces.
Never occurs in nature in normal cases.
Ideal Conditions
High density and high-temperature atmosphere are the requirements.
There is a necessity to have a critical mass of the substance and neutrons with high speed.
Reaction Outcome
Very few radioactive chemicals come out of this reaction.
The fission reaction produces highly radioactive substances.
Fuel Used
Hydrogen isotopes are used as fuel in experimental plants.
Uranium is one of the primary fuels in nuclear power plants.



  1. This is an amazing way to teach the students in this lock down. Wow 😊😊😊😊

  2. I really appreciate your for your way of teaching

Leave a Comment

Your email address will not be published. Required fields are marked *