List of top Physics Questions on Nuclei asked in Bihar Board XII

The decay constant of a radioactive substance is 5.2 x 10\(^3\) per year. What is its half-life?
What is carbon dating?
The half-life of a radioactive isotope (\(^{210}\)Bi) is 5 days. The fraction of the nuclei undecayed at the end of 20 days will be
The unit of radioactivity is
Which of the following has the highest penetrating power?