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Fission and Fusion - GCSE Physics - Summary
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Fission is the splitting of large nuclei into smaller nuclei.
Fusion is the joining of small nuclei into larger nuclei.
Fission is currently used on Earth in nuclear reactors. These use isotopes and create waste products with very long half-lives, so have serious risks attached.
Fusion is currently only used on Earth for weapons, however it is the main reaction by which stars release energy and has been used for space craft propulsion. It is currently not possible on in fusion reactors on Earth to have a net gain of energy from the reaction. Nuclear fusion leaves no radioactive waste.
When more massive unstable nuclei split to form less massive more stable nuclei, energy is released.
Spontaneous fission is quite rare. Fission is induced when a fissile nucleus absorbs a neutron. It becomes very unstable and undergoes fission, it releases two or three neutrons and also gamma photons. The neutrons can go onto cause more fissions. This is what is meant by a chain reaction. Each fission causes more fissions (exponentially).
When two less massive nuclei fuse to create a more massive one, some mass is converted to energy.
Other channels cover the content but GorillaPhysics will help you get the grade 9 or that A* at A Level.
Also, if you like GorillaPhysics and want to help me shape and expand my channel and resources, why not join my Patreon community and become part of Gary’s squad:
Student Amazon Prime! Free prime for six months and then half price from then on!
This would have been so useful as a student to get next day delivery on so many essentials, but also for the music, and amazon video you get included in prime as well. You might as well really! And you say thanks to GorillaPhysics as I get a small bounty when you use my link!
You can now support GorillaPhysics by buying your next educational purchase from Amazon at my store:
At Gorilla Physics we’re all about you understanding more, so you get more confident, then enjoy Physics more and then you’ll do better in your GCSE and A Level Physics exams.
Buy my book to help you memorise all the equations for GCSE Physics or Combined Science, for AQA, OCR A and B, Edexcel and Eduqas exam boards.
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Fusion is the joining of small nuclei into larger nuclei.
Fission is currently used on Earth in nuclear reactors. These use isotopes and create waste products with very long half-lives, so have serious risks attached.
Fusion is currently only used on Earth for weapons, however it is the main reaction by which stars release energy and has been used for space craft propulsion. It is currently not possible on in fusion reactors on Earth to have a net gain of energy from the reaction. Nuclear fusion leaves no radioactive waste.
When more massive unstable nuclei split to form less massive more stable nuclei, energy is released.
Spontaneous fission is quite rare. Fission is induced when a fissile nucleus absorbs a neutron. It becomes very unstable and undergoes fission, it releases two or three neutrons and also gamma photons. The neutrons can go onto cause more fissions. This is what is meant by a chain reaction. Each fission causes more fissions (exponentially).
When two less massive nuclei fuse to create a more massive one, some mass is converted to energy.
Other channels cover the content but GorillaPhysics will help you get the grade 9 or that A* at A Level.
Also, if you like GorillaPhysics and want to help me shape and expand my channel and resources, why not join my Patreon community and become part of Gary’s squad:
Student Amazon Prime! Free prime for six months and then half price from then on!
This would have been so useful as a student to get next day delivery on so many essentials, but also for the music, and amazon video you get included in prime as well. You might as well really! And you say thanks to GorillaPhysics as I get a small bounty when you use my link!
You can now support GorillaPhysics by buying your next educational purchase from Amazon at my store:
At Gorilla Physics we’re all about you understanding more, so you get more confident, then enjoy Physics more and then you’ll do better in your GCSE and A Level Physics exams.
Buy my book to help you memorise all the equations for GCSE Physics or Combined Science, for AQA, OCR A and B, Edexcel and Eduqas exam boards.
You can have the kindle edition for free on your phone with a free trial of kindle unlimited:
Otherwise check out these most popular playlists:
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