Question 1
What is meant by radioactive decay?
Question 2
Which type of radiation has the greatest ionizing power but the least penetrating power?
Question 3
What does the half-life of a radioactive substance mean?
Question 4
A sample contains $800$ radioactive nuclei at the start. If its half-life is $1$ hour, how many nuclei remain after $2$ hours?
Question 5
Which process occurs when a nucleus emits a beta particle?
