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What is the difference between nuclear fission and nuclear fusion?

Fission is a process in which a heavy nucleus of an element splits into two or more stable elements. This fission reaction is associated with the release of energy. For example, the process of U235 fission is triggered by hitting U235 by a slow-moving neutron. It gives Barium( 144), Krypton (89) and three neutrons along with 210Mev of energy. Fusion: Two light elements such as Hydrogen nucleus fuse or combine to form a heavier nucleus. This reaction takes place in stars and our sun as well. Two hydrogen nucleus combine to form heavy hydrogen along with the release of energy they continue to fuse again until a stable nucleus of Helium is formed. The most important question is why energy is released??? Why is He stable?..and please do think many more why and How?.

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Sumangla Kapoor
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Fission is when an unstable nucleus spontaneously decomposes into two or more smaller, more stable nuclei. Eg: Uranium-235 undergoes nuclear fission to become Barium-139 and Krypton-94 plus 3 neutrons. In summary a big unstable nucleus falls apart (decays) and becomes two or more smaller nuclei. Fusion is when two or more small nuclei fuse together to form a bigger nucleus. E.g. Hydrogen nuclei undergo fusion to form a helium nucleus. This process requires a lot more input energy than fission. Essentially fission and fusion are opposites of each other. In fission nuclei decompose and in fusion the nuclei fuse together.

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Josh Prince
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I am an approachable incoming 2nd year medical student at University College London (UCL). I am a 2021 graduate of Dulwich College where I was also Vice-Captain in my final year and my responsibilities included liaising with the Academic Team about the curriculum and supporting students progressing up the College with their studies. I achieved all A*s at GCSE, and A*A*A*A* in Biology, Chemistry, Maths and Latin at A Level respectively. Throughout my career at the College, I was fortunate to gain experience early on in mentoring and working with those struggling with their studies at several local schools across Southwark. On a weekday lunchtime for two years, I would give up an hour to spend time working through areas students found challenging. I recently mentored a disengaged and shy Year 10 pupil; actively listening to his problems and building trust were essential to improving his academic progress, which was humbling. I have always taken a great interest in Biology, Chemistry, Maths & Latin (my A Level subjects) from the beginning. During the months leading up to the Latin GCSE exam, I would compile resources for my class and go through important concepts with both friends and my class. Knowledge has always been something that should be shared to me, and I believe that it is possible for anyone to achieve the top grades if they are motivated, diligent, and guided methodically. Tutoring and helping others maximise their full academic potential has always been something that I have enjoyed. I am extremely passionate in offering support in the respective subject, but also in providing a more holistic approach. I am keen to discuss revision techniques, share experiences and direct students/parents to resources at schools that they may not be aware of. It was only a few months ago that I was at school, and I can appreciate the demands it can place on students. I am also keen to help those applying for medicine or Year 7/9 entry to independent schools – I went through this rigorous process not long ago, and there is a lot I have taken away in the process. I would love to help and guide anyone who is interested. I also help students with medical school applications, and offers have been secured at universities such as UCL and Edinburgh. Ever since I started my GCSEs, I knew I would love to tutor students once I finish my A Levels and graduate from Dulwich College. I currently tutor five students across London and the Home Counties – two in GCSE and three in KS3. I have just finished tutoring two students right the way through from the Year 10 summer to their last GCSE exam. *I am currently recruiting students for 2022-23*. Thank you for reading, and I would be delighted to help your son/daughter. Tutoring Approach: I am extremely organised, and tailor lessons according to the relevant specifications. With the increase in online students due to the pandemic, I am very confident in using video conference to tutor and Microsoft applications to create resources. My teaching style is based around first gaining an overview and understanding of the topic, and then moving to exam questions to identify any misunderstandings or gaps in knowledge. As a medic, I try to incorporate real-life examples when teaching topics to make lessons more engaging and interesting. Active recall and spaced repetition form an essential element of my teaching. The use of examiner’s reports and mark schemes are also vital in this process. As a student, I would always endeavour to be ‘one-step ahead’ and I have been keen to pass this onto my students – be it noticing common patterns in exam questions, specific terminology that exam boards like or observing common pitfalls. Experience Tutoring Experience: Over 140 hours tutored (since June 2021) I have been involved in several tutoring programmes at Dulwich College, which included tutoring a student in Latin GCSE in my final year. I would often run sessions within my class where we would go through material. At UCL, I have completed a module and workshop which explores teaching methods. Academic Experience: A Levels at Dulwich College (2021): 4A*s in Biology, Chemistry, Maths & Latin. A* in EPQ. UCAT & BMAT (2020) GCSEs at Dulwich College (2019): x9 Grade 9s, x1 Grade 8 & A in Additional Maths Common Entrance at Homefield Preparatory School (2016) Comments: ‘I have tremendous admiration for the manner with which Rohan approaches his studies. He is a conscientious and mature student who always produces work to the best of his ability.’ ‘Rohan’s organisation and work ethic shines through. The overall picture is that Rohan is well on course to achieving the top grades at A Level.’ ‘He is eager for challenge and goes beyond the course materials provided to find additional questions to work on.’ ‘He is a conscientious young man who is determined to succeed in all he does. I have been particularly impressed with the extra work he has done of his own volition to consolidate his knowledge of the topics covered to date and also to learn from any slight errors in his answers.’ ‘I have been incredibly impressed by Rohan's motivation this year. Not only has he dealt with the challenge of completing the AS [Latin] course in a small number of periods a week, he has also learnt all the material to an exceptionally high standard.’ ‘It has been a delight working with Rohan this term. He is an extremely hard working and motivated pupil, and our lessons are always very productive. He is focused, industrious and proactive, creating and maintaining a fantastic [Latin] OneNote with all the course resources.’

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