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Radioactivity for Kids

Radioactivity

Radioactivity, also known as radioactive decay, is a process by which a radioactive isotope loses subatomic particles (helium nuclei or electrons) from its nucleus along with usual emission of gamma radiation, and becomes a different element. In a large collection of atoms, there is a definite time, called the half-life of the isotope, after which one-half of the total number of nuclei would have decayed. This time varies from few-millionths of a second to millions of years for different radioactive isotopes.
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The Discovery of Radioactivity
Grade: 8 - 12
The lesson describes the discovery of radioactivity, and explains radiation.
9:10
 

Type of Radioactive Particles
Grade: 8 - 12
The lesson describes the three types of radioactive particles that give off energy.
2:50
 

Radiation and Radioactive Decay
Grade: 8 - 12
Lesson on Radioactivity - It explains why radiation occurs and describes the major types of radiation. It shows how alpha, beta, and gamma radiation affect the nucleus of a radioactive atom.
11:00
 

Radioactive Isotopes
Grade: 8 - 12
Learn about isotopes, alpha particles, beta particles and gamma rays.
3:55
 

Fission and Fusion
Grade: 8 - 12
A lesson on nuclear fission and fusion. The lesson explains the nuclear force and the electric force acting inside the nucleus of atoms.
8:35
 

Radiation
Grade: 8 - 12
The lesson looks at radiation in space and on Earth. Learn about two types of radiation and how NASA engineers are developing better shielding material to protect astronauts during long missions in space.
3:30
 

Radiocarbon Dating
Grade: 8 - 12
Learn about Radiocarbon dating. The lesson explains how Carbon-14 dating can be used to date ancient material such as fossils and rocks.
9:30
 

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Topic : Radioactivity
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