What condition is not necessary for a chain reaction to occur?

1. What conditions are required for a chain reaction?
2. What is not needed for a nuclear chain reaction?
3. What sets off a chain reaction?
4. What is necessary to sustain a nuclear chain reaction?
5. What causes a chain reaction?
6. How do nuclear chain reactions occur?
7. Why would a chain reaction need to be controlled in a nuclear reactor but not in a nuclear bomb?
8. What is nuclear chain reaction explain the difficulties?
9. What is a chain reaction explain the difficulties encountered in sustaining a chain reaction?
10. What three steps are involved in a chain reaction?
11. Which element is used in chain reaction?
12. What is a chain reaction mechanism?
13. Why it is necessary to control this reaction?
14. What is the condition for self sustained fission chain reaction?
15. What would happen if nuclear fission is not controlled properly?

What conditions are required for a chain reaction?

The chain reaction requires both the release of neutrons from fissile isotopes undergoing nuclear fission and the subsequent absorption of some of these neutrons in fissile isotopes.

What is not needed for a nuclear chain reaction?

What is not needed for a nuclear chain reaction? atomic mass number.

What sets off a chain reaction?

chain reaction. noun. a process in which a neutron colliding with an atomic nucleus causes fission and the ejection of one or more other neutrons, which induce other nuclei to split. a chemical reaction in which the product of one step is a reactant in the following step.

What is necessary to sustain a nuclear chain reaction?

In order to sustain a nuclear chain reaction, every fission event must lead to exactly one more fission event. The most convenient nuclear species to use for nuclear chain reactions is a fissile isotope of uranium, ²³⁵U. ... Careful engineering must go into having those neutrons go on to create more fission events.

What causes a chain reaction?

A chain reaction refers to a process in which neutrons released in fission produce an additional fission in at least one further nucleus. This nucleus in turn produces neutrons, and the process repeats. ... If each neutron releases two more neutrons, then the number of fissions doubles each generation.

How do nuclear chain reactions occur?

Nuclear chain reactions are series of nuclear fissions (splitting of atomic nuclei), each initiated by a neutron produced in a preceding fission. For example, 2¹/₂ neutrons on the average are released by the fission of each uranium-235 nucleus that absorbs a low-energy neutron.

Why would a chain reaction need to be controlled in a nuclear reactor but not in a nuclear bomb?

The additional neutrons released may also hit other uranium or plutonium nuclei and cause them to split. Even more neutrons are then released, which in turn can split more nuclei. This is called a chain reaction. The chain reaction in nuclear reactors is controlled to stop it moving too quickly.

What is nuclear chain reaction explain the difficulties?

Answer: Nuclear Chain Reactions. A chain reaction refers to a process in which neutrons released in fission produce an additional fission in at least one further nucleus. This nucleus in turn produces neutrons, and the process repeats. The process may be controlled (nuclear power) or uncontrolled (nuclear weapons).

What is a chain reaction explain the difficulties encountered in sustaining a chain reaction?

If the size of the fissionable material is small, the neutrons emitted will escape the fissionable material before they are slowed down. Hence chain reaction cannot be sustained. Removal : The size of the fissionable material should be large than a critical size. ... If k = 1, the chain reaction will be steady.

What three steps are involved in a chain reaction?

PCR is based on three simple steps required for any DNA synthesis reaction: (1) denaturation of the template into single strands; (2) annealing of primers to each original strand for new strand synthesis; and (3) extension of the new DNA strands from the primers.

Which element is used in chain reaction?

The elements used in fission chain reaction are uranium-235 and plutonium-239. Fission chain reaction is a chain reaction that involves the breakdown of a heavy nucleus such as uranium into small daughter nuclei( barium and krypton in case of uranium).

What is a chain reaction mechanism?

A chain reaction is a sequence of reactions where a reactive product or by-product causes additional reactions to take place. In a chain reaction, positive feedback leads to a self-amplifying chain of events.

Why it is necessary to control this reaction?

If fission reaction in nuclear power plants is not controlled, then enormous amount of heat released during this process will lead to explosion of the plant and cause fatal destruction to environment and mankind. Thus, it is absolutely necessary to control the fission reaction in nuclear power plants.

What is the condition for self sustained fission chain reaction?

A fission chain reaction is self-sustaining when the number of neutrons released in a given time equals or exceeds the number of neutrons lost by absorption in nonfissionable material or by escape from the system.

What would happen if nuclear fission is not controlled properly?

Using Energy from Nuclear Fission

If a nuclear chain reaction is uncontrolled, it produces a lot of energy all at once. This is what happens in an atomic bomb.