Radioactivity quiz
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Which isotope is used to date ancient bones and wood?
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More questions about Radioactivity
These visible examples show the question style. LearnClash turns the full topic into ranked duels and spaced repetition.
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What cancer is radon gas a leading cause of?
Answer: Lung cancer
Why: The WHO estimates radon causes 3% to 14% of a country's lung cancers, depending on its radon levels and how many people smoke.
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Which unit counts one radioactive decay per second?
Answer: Becquerel
Why: The older curie unit is 37 billion becquerels, a figure first tied to the activity of one gram of radium.
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What process made the helium found in natural gas?
Answer: Alpha decay
Why: An alpha particle is two protons and two neutrons bound together, which is exactly the nucleus of a helium atom.
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What color is pure uranium metal?
Answer: Silvery gray
Why: Freshly cut uranium is silvery, but in air it soon gains a dark coating of uranium dioxide.
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What does heating a radioactive sample do to its half-life?
Answer: No change
Why: The nucleus is so small and so tightly bound that heat, pressure and chemical bonds around it barely reach it.
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What is the lightest element whose atoms are all radioactive?
Answer: Technetium
Why: Technetium-99m, with a half-life of about 6 hours, is used in tens of millions of medical scans every year.
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