2. A sample of radioactive Najs is found to be decaying into Mg12 with a rate of 548 decays per second at 1-0 min. At r-480 min, the counting rate has fallen to 378 decays per second. (What is the half-life of the radioactivity? What is its decay constant? (e) What will be the activity at r-15 hours? (What type of decay mode is this? Calculate the Q-value for this decay. > Gauth
2. A sample of radioactive Najs is found to be decaying into Mg12 with a rate of 548 decays per second at 1-0 min. At r-480 min, the counting rate has fallen to 378 decays per second. (What is the half-life of the radioactivity? What is its decay constant? (e) What will be the activity at r-15 hours? (What type of decay mode is this? Calculate the Q-value for this decay. > Gauth
Question
Transcribed Image Text:2. A sample of radioactive Najs is found to be decaying into Mg12 with a rate of 548
decays per second at 1-0 min. At r-480 min, the counting rate has fallen to
378 decays per second.
(What is the half-life of the radioactivity?
What is its decay constant?
(e) What will be the activity at r-15 hours?
(What type of decay mode is this? Calculate the Q-value for this decay.
> Gauth
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