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Ionising and Uses
Ionising radiation has enough energy to remove electrons from atoms or molecules, producing ions.
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Ionising and Uses
Recommended for Class 10
Ionising and Uses
Ionising radiation has enough energy to remove electrons from atoms or molecules, producing ions.
Alpha, beta and gamma can all cause ionisation, but their ionising abilities differ.
Relative Ionising Ability
At this level:
Alpha → very strong ionising ability
Beta → medium
Gamma → lower per interaction
Why Alpha Ionises Strongly
Alpha particles have:
relatively large mass; +2 charge; * strong interaction with matter.
They transfer energy rapidly over a short distance.
Useful Applications of Ionising Radiation
Controlled ionising radiation can be useful in:
medical imaging; radiotherapy; tracers; sterilisation; * industrial monitoring.
Balance of Benefit and Risk
Ionising radiation can damage biological tissue, so applications are designed to use only appropriate, controlled exposure.
Ionising and Uses — Advanced
Common Mistakes
Common Mistakes
- Mistake
“More penetrating” does not mean “more ionising.”
- Mistake
Alpha is less penetrating but more strongly ionising.
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Practice
PQ
Q1. Define ionisation.
PQ
Q2. Rank ionising power of α, β and γ.
PQ
Q3. Explain why alpha ionises strongly.
PQ
Q4. Give two uses of ionising radiation.
PQ
Q5. Explain benefit-risk balance.
Exam Practice
EQ
Q1. Define ionisation.
EQ
Q2. Compare ionising abilities of α, β and γ.
EQ
Q3. Explain why alpha ionises strongly.
EQ
Q4. Describe useful applications.
EQ
Q5. Explain controlled exposure.
School-standard facts for Matric and Intermediate. Original explanations — not copied from textbooks.