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RADON EXAM QUESTIONS AND ANSWERS
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RADON EXAM QUESTIONS AND ANSWERS
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RADON EXAM QUESTIONS AND ANSWERSWhat is radon? - Answers --redioactive odourless, colourless gas
-created in radioactive decay of uranium
-naturally in soils
-heavier than air
Measured? - Answers -in Becquerels (Bq) per cubic meter
-one Bq is one decay per second
Canadian Guideline? - Answers -200 Bq/m3
Radioactivity - Answers --particles or rays emitted from nuclei from nuclear instability
Radioactive decay: - Answers -unstable atomic nucleus loses energy by emitting
ionizing particles and radiation
3 types of radioactive decay - Answers -alpha
beta
gamma
Alpha Particles Damage - Answers --can pit plastic exposed to 3 months of radon at
150 Bq/m3
Risks? (4) - Answers --16% of all lung cancers from radon gas
-expected to kill 3,000 canadians per year
-to kill 200 in BC per year
-second leading cause of lung cancer
Radon risk in persepctive - Answers -below infectious diseases/car accidents, above
accidental poisoning/drownings/fires
Radon Risk Evaluation Chart - Answers --600 Bq/m3 means 1 pack a day smoker
-guideline relatable to 1/2 pack per day
Where does radon occur? - Answers --all over the world
-"background level" is amount in air
-can go into lower levels of homes, and build up in basements
-East of Coast Mountains in BC have higher concentrations
How does radon enter a house - Answers --fractured bedrock
-soil
-in well
-dissolves into groundwater
-windows
-cracks
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