Radon-222 has a half-life of 3.823 days. If a sample of pure radon-222 has an initial mass of 0.750 g, how much time is needed for only 0.100 g of radon-222 to remain?
Radon-222 decays by emission and is one of the largest sources of radiation exposure for many people.
Write a balanced equation for the decay of radon-222.
After 12.7 days, 90.0% of a sample of radon-222 has decayed. Calculate the half-life for the decay process.
Radon-222 is most hazardous if inhaled. Which properties of particles are responsible for this effect?
What is the half-life of a radioactive material?