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Slide 1

Fission and Fusion

Slide 2

CS 4.4

CS 4.5

State that in fission a nucleus of large mass splits into 2 nuclei of smaller mass numbers, usually with the release of neutrons.

State that fission may be spontaneous or induced by neutron bombardment.

Slide 3

CS 4.6

CS 4.7

CS 4.8

State that in fusion, 2 nuclei combine to form a nucleus of larger mass number.

Explain, using E = mc2, how the products of fission and fusion acquire large amounts of kinetic energy.

Carry out calculations using E = mc2 for fission and fusion reactions.

Slide 4

When atoms are bombarded with neutrons, their nuclei splits into 2 parts which are roughly equal in size.

Nuclear fission in the process whereby a nucleus, with a high mass number, splits into 2 nuclei which have roughly equal smaller mass numbers.

During nuclear fission, neutrons are released.

Slide 5

There are 2 types of fission that exist:

1. Spontaneous Fission

2. Induced Fission

Slide 6

Some radioisotopes contain nuclei which are highly unstable and decay spontaneously by splitting into 2 smaller nuclei.

Such spontaneous decays are accompanied by the release of neutrons.

Slide 7

Nuclear fission can be induced by bombarding atoms with neutrons.

Induced fission decays are also accompanied by the release of neutrons.

The nuclei of the atoms then split into 2 equal parts.

Slide 8

A neutron travels at high speed towards a uranium-235 nucleus.

Slide 9

The Fission Process

A neutron travels at high speed towards a uranium-235 nucleus.

Slide 10

The Fission Process

A neutron travels at high speed towards a uranium-235 nucleus.

Slide 11

The neutron strikes the nucleus which then captures the neutron.

The Fission Process

Slide 12

- Nuclear Reactions
- Fission
- Nuclear Fission
- Spontaneous Fission
- Induced Fission
- The Fission Process
- Energy from Fission
- Energy Released
- Nuclear Fusion

- Heat-Energy on the Move
- Sound
- Newton’s Laws of Motion
- Practical Applications of Solar Energy
- Space Radiation
- Thermal Energy
- Newton’s law of universal gravitation

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