Radioactive dating gcse questions


12-Feb-2020 16:00

The isotope Uranium-238 has a half life as long as 4.5 billion years whereas the half life of Thorium-234 is as little as 24 days.The animation below explains the half life of a radioactive isotope.What is the activity of the radioisotope after 3 half lives?When home owners, in areas where radon gas is produced, were told of the risks, very few too notice.At the start of the measurement the radioisotope has 10,000 unstable nuclei.

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When they die they stop taking Carbon in, then the amount of Carbon-14 goes down at a known rate (Carbon-14 has a half-life of 5700 years).Smoke alarms contain a weak source made of Americium-241.