O-LevelPhysicsNuclear Physics5054/11 · May/June 2012 · Q391 Mark
When dealing with radioactive materials there are possible dangers. Which statement is correct?
ABeta-particles can pass through skin and damage body cells.
BMaterials that emit only alpha-particles must be kept in thick lead containers.
CRadioactive materials are safe to handle after two half-lives.
DSources of gamma radiation are dangerous because they have long half-lives.
✓ Correct answer
A: Beta-particles can pass through skin and damage body cells.
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