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18.4. what are the three basic radioactive decay processes and how do they differ from each other?

18.4. what are the three basic radioactive decay processes and how do they differ from each other?

18.8. is radioactivity a spontaneous process? elaborate your answer with a simple experiment.

18.8. is radioactivity a spontaneous process? elaborate your answer with a simple experiment.

18.9. what is meant by background radiations? enlist some sources of background radiations.

18.9. what is meant by background radiations? enlist some sources of background radiations.

v. the half-life of a certain isotope is 1 day. what is the quantity of the isotope after 2 days?(a) one-half(b) one-quarter(c) one-eighth(d) none of these

v. the half-life of a certain isotope is 1 day. what is the quantity of the isotope after 2 days?(a) one-half(b) one-quarter(c) one-eighth(d) none of these

18.5. half-life of a radioactive element is 10 minutes. if the initial count rate is 368 counts per minute find the time for which count rates reaches 23 counts per minute.ans. (40 minutes)

18.5. half-life of a radioactive element is 10 minutes. if the initial count rate is 368 counts per minute find the time for which count rates reaches 23 counts per minute.ans. (40 minutes)

18.4. technetium-99 is a radioactive element and is used to diagnose brain thyroid liver and kidney diseases. this element has half-life of 6 hours. if there is of this technetium present how much will be left in 36 hours.ans. (3.12mg)

18.4. technetium-99 is a radioactive element and is used to diagnose brain thyroid liver and kidney diseases. this element has half-life of 6 hours. if there is of this technetium present how much will be left in 36 hours.ans. (3.12mg)