Thursday, August 27, 2009

[Science Form 4] Fission & Fusion

Nuclear Fission
When a high energy neutron hits a uranium-235 nucleus, the U-235 nucleus becomes uranium-236, which is highly unstable. The unstable uranium nucleus then splits into two smaller and more stable nuclei - barium-141 and krypton-92.

Three neutrons and a great amount of energy are released during the fission. Along with the energy, light and heat are released. Gamma rays are emitted during the process, which is carried out in a nuclear reactor where energy is produced. This form of energy supplies 16% of the world's supply of electrical energy.

Nuclear Fusion
In nuclear fusion, the tritium nucleus and the deuterium nucleus are combined to form a heavier nucleus. During the process, an alpha particle and a neutron is released, together with a large amount of energy, though less than that produced from nuclear fission. The nuclear fusion activity can be seen from sun flares, which give us light and heat.


  1. too much technical stuff for me here. Maybe I'm too old for this kind of info. Even during my sophomore year, I couldn't even manage to get a C+ for my chemistry course.

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  2. saya ada sediakan powerpoint berkaitan science form 4 dapatkan nya di

    sila berikan comment.terima kasih.

  3. Admin -> Thank you for sharing...


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