Question

What happens in a chain reaction

Answer 1

Hi there! A nuclear fission is a chain reaction. What happens in a food chain is that a uranium-235, which is a atom absorbs a neutron, and then it fissions into two new atoms. Which then releases three new neutrons and a lot of binding energy.

Answer 2

Answer: Neutrons released act as reactants in next reaction.

Step-by-step explanation:

Nuclear chain reactions occur in fission reactions only. Nuclear fission reactions are defined as the reactions in which larger nuclide splits into two or more smaller daughter nuclides.

In nuclear chain reaction, the neutrons that are released in the previous fission reaction act as the starting material in the next reaction. Thus, this process continues to many reactions and hence, is known as nuclear chain reaction.

For Example: Uranium-235 on bombardment of 1 neutron undergoes fission reaction producing 3 neutrons and a huge amount of energy. The reaction follows:

`_(92)^(235)\textrm{U}+_0^1n\rightarrow 3_0^1n+_(36)^(92)\textrm{Kr}+_(56)^(141)\textrm{Ba}+\text{energy}`

Hence, neutrons released act as reactants in next reaction.