Assertion :The nuclear fusion reaction releases less energy than the fission reaction. Reason: The nuclear fusion reaction takes place in the sun and other stars.
Assertion
The nuclear fusion reaction releases less energy than the fission reaction.
Reason
The nuclear fusion reaction takes place in the sun and other stars.
Assertion is incorrect but Reason is correct.
Fission only produces more energy than it consumes in large nuclei (common examples are Uranium & Plutonium, which have around 240 nucleons (nucleon = proton or neutron)). Fusion only produces more energy than it consumes in small nuclei (in stars, Hydrogen & its isotopes fusing into Helium).
Once these conditions are reached in the core of a star, nuclear fusion converts hydrogen atoms into helium atoms through a multi-stage process. ... This fusion cycle is known as the proton-proton chain, and it's the reaction that happens in stars with the mass of our Sun.