1. When radium-226 is transmuted by a nuclear decay to radon-222, the process involved?
2. Explain how long will it take for radiation to fall to one fourth when 67Ga has a half-life of 78 hours.
3. Discuss how long will it take 67 g radiations to fall to on eight?
4. How much of a 1000mg sample is left after 56 days when Phosphorus-23 has a half life of 14days.
5. The half-life of cesium-137 is 30yrs. Of an initial 100 g sample, explain how much cesium-137 will remain after the 300 yrs in mg?