1. FISSION and FUSION

2. Nuclear Fission
The splitting of a more massive nucleus of an atom into 2 smaller nuclei, subatomic particles and energy (radiation)

3. Fission
Massive nucleus
2 smaller nuclei
Subatomic particles
Energy

4. Fission Reaction: n + U  Kr + Ba + 3 n + energy
235 92
141 1 1
n U  Kr Ba n + energy 92 36 56 93
235
___
141 1 1 Kr
n U  ____ Cs n + energy 36 92
___ 56

5. Fission Chain Reaction

6. Nuclear Fission at Work – CANDU Reactors (Canadian Nuclear Reactors)

7. Fission Chain Reaction at work – the Atom Bomb (Originally made with Uranium or Plutonium)

8. Nuclear Fusion
The joining (fusing) of 2 smaller, lower mass nuclei together, to make 1 more massive nucleus, and give off energy and subatomic particles too.

9. Fusion Small Atom Small Atom Massive Atom Massive Atom
(unstable)
Massive Atom
Particles given off

10. Fusion Reaction of Hydrogen

11. Fusion Reaction: H+ H  He + + n + energy2 3 4 1
H H  He n + energy 1 1 2
234 92
141
___ 1
3 n Kr Ba  ____ energy U 92 36 56
___
Remember… what’s on the left of the arrow must EQUAL what’s on the right

12. Fusion chain reaction at work – the Hydrogen Bomb

13. Fusion at work - The Sun

14. Fission Vs. Fusion
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Harnessing the Sun’s Power of Nuclear Fusion
Nuclear Bomb Test (actual footage from 1946)
Atomic Bomb Test