"Nuclear Energy" Energy and Sustainable Development PPT Courseware 3

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"Nuclear Energy" Energy and Sustainable Development PPT Courseware 3

1. Nuclear energy

1. Atomic structure

Take the water molecule, for example: it consists of one oxygen atom and two hydrogen atoms.

Atoms are composed of a nucleus and electrons outside the nucleus.

(1) A hydrogen atom consists of a nucleus and an extranuclear electron.

The nucleus of an atom has a proton, which has a positive charge, and the electrons outside the nucleus have a negative charge. Both have the same charge.

(2) Oxygen atom consists of a nucleus and eight extranuclear electrons.

There are eight protons and eight neutrons in the nucleus. Since neutrons are uncharged, the positive and negative charges are still the same.

2. nuclear energy

Protons and neutrons are tightly bound together by the powerful nuclear force. It is extremely difficult to separate or combine them.

When the nuclei of larger masses split or the nuclei of smaller masses combine with each other, it is possible to release amazing energy, which is nuclear energy.

2. Fission

In 1938, scientists bombarded the relatively massive uranium-235 nucleus with neutrons, causing it to fission.

When 1 kg of uranium is completely fissured, the energy released exceeds the energy released when 2,000 tons of coal is completely burned.

1. conditions for fission to occur

When neutrons are used to bombard uranium nuclei, the uranium nuclei can undergo fission and release energy.

When external neutron bombardment stops, fission stops. How can we allow fission to continue?

2. chain reaction

Want to discuss

Set the matches into the structure shown in the lower left picture. What will happen after the first match is lit?

Use neutrons to bombard uranium-235 nuclei. When the uranium nuclei split, they will release nuclear energy and produce several new neutrons, which will continue to bombard other uranium nuclei. This results in a series of uranium nuclei continuing to fission and releasing a large amount of nuclear energy. This is the chain reaction in fission.

3. Nuclear power plants use nuclear energy to generate electricity

The core equipment of a nuclear power plant is the nuclear reactor. A nuclear reactor is a place where a chain reaction of atomic nuclei occurs.

In 1942, humans used a nuclear reactor to achieve controlled uranium nuclear fission for the first time.

3. Fusion

Combining atomic nuclei with smaller masses also releases huge amounts of nuclear energy.

Deuterons and tritium nuclei combine at ultra-high temperatures to form helium nuclei and a neutron, which can release a large amount of nuclear energy. This process is fusion.

Deuterons and tritium nuclei are both types of hydrogen nuclei. The fusion of a large number of hydrogen nuclei can release amazing energy in an instant. Hydrogen bombs use the energy released instantly by fusion.

Controllable fusion has not yet been realized, and seawater contains abundant deuterons. Scientists predict that the use of nuclear energy through controllable fusion will be expected to completely solve human energy problems.

Keywords: Energy and Sustainable Development Teaching Courseware, Nuclear Energy Teaching Courseware, New People's Education Edition Ninth Grade Physics PPT Courseware, Ninth Grade Physics Slide Courseware Download, Energy and Sustainable Development PPT Courseware Download, Nuclear Energy PPT Courseware Download, .ppt format

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"Nuclear Energy" PPT courseware:

"Nuclear Energy" PPT courseware Part One: Nuclear Energy The energy released during the change of atomic nuclei. There are two ways to obtain nuclear energy: 1. Fission. A process in which a heavier atomic nucleus splits into two new nuclei under neutron bombardment and releases energy. 2..

"Nuclear Energy" PPT:

"Nuclear Energy" PPT Part One Content: Learning Objectives 1. Master the two ways to obtain nuclear energy. 2. View the peaceful use of nuclear energy from the perspective of dialectical materialism. 3. Understand the development history, current situation and prospects of my country's nuclear energy, and cultivate students' patriotic sentiments. ... ... ..

"Nuclear Energy" Energy and Sustainable Development PPT Courseware 5:

"Nuclear Energy" Energy and Sustainable Development PPT Courseware 5 Nuclear energy Nuclear energy (or atomic energy) is the energy released from the nucleus by converting its mass, in line with Albert Einstein's equation E=mc, where E=energy, m=mass , c=speed of light constant. Nuclear energy passes through three types of nuclear...

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Update Time: 2024-10-03

This template belongs to Physics courseware People's Education Edition Ninth Grade Physics Complete Book industry PPT template

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