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GCSE Physics: Radioactivity

Radiation is all around us! It can be dangerous, but is also vital to life. Learn more here:

Unstable Nuclei
Isotopes
Types of Radiation
Penetration Power
Background Radiation
Count Rates
Half Life
  Isotopes II
Decay Equations
Safety
Effects
Uses
Dating
Harmful Nature

Recent Additions: How people first came to realise just how old the earth is in the dating section.

If you're looking for something specific, try the Physics Index or Glossary.

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