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Types and properties of radiation

Atomic structure • Atoms and nuclear radiation

Key concepts

What you'll likely be quizzed about

  • Alpha radiation consists of helium nuclei emitted from the nucleus of an unstable atom.
  • It has a short range and can be stopped by a sheet of paper.
  • Alpha particles are positively charged and interact strongly with matter, which makes them dangerous if ingested or inhaled but harmless externally due to their limited penetration.

Flashcards

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What characterizes gamma radiation?

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Gamma radiation features high-energy electromagnetic waves that can penetrate dense materials.

Key notes

Important points to keep in mind

Alpha radiation is stopped by paper.

Beta particles require metal sheets for protection.

Gamma rays need lead or thick concrete for shielding.

Use caution with all forms of radiation.

Understand applications to ensure safety.

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