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JSS3: BASIC SCIENCE - 2ND TERM

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  1. Light Energy | Week 1
    2 Topics
  2. Reflection of Light | Week 2
    5 Topics
    |
    1 Quiz
  3. Sound Energy | Week 3
    4 Topics
  4. Sound Energy - Echoes, Hearing | Week 4
    2 Topics
    |
    1 Quiz
  5. Electrical Energy - Concept of Electrical Flow | Week 5
    2 Topics
  6. Arrangement of Resistors | Week 6
    3 Topics
  7. Electrical Meter Reading and Billing | Week 7
    2 Topics
    |
    1 Quiz
  8. Magnetism | Week 8
    2 Topics
  9. Laws of Magnetism | Week 9
    4 Topics
    |
    1 Quiz
  10. Radioactivity | Week 10
    5 Topics
    |
    1 Quiz



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As a result of the difference in stability of different nuclei, there are four types of nuclear reactions.

1. Radioactive decay: This refers to the emission of an alpha particle, a beta particle, or gamma radiation and the formation of a slightly lighter and more stable nucleus.

2. Nuclear Disintegration: A nucleus is bombarded with alpha particles, particles, protons, deuterons (deuterium nuclei, \( \scriptsize _{1} ^{2} \textrm {H}\)), neutrons, or other particles. The unstable nucleus emits a proton or a neutron and becomes more stable in a process called nuclear disintegration.

3. Fission: This refers to the process in which a very heavy nucleus splits to form medium  – mass nuclei.

4. Fusion: This is the process in which light mass nuclei combine to form heavier, more stable nuclei.  

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