Exam 24: Nuclear Reactions and Their Applications

A pure sample of tritium, ³H, was prepared and sealed in a container for a number of years. Tritium undergoes $\beta$ decay with a half-life of 12.32 years. How long has the container been sealed if analysis of the contents shows there are 5.25 mol of ³H and 6.35 mol of ³He present?

Identify the missing species in the following nuclear transmutation:

Briefly, explain the relationship between the rad and the rem as units of radiation dosage.

Which one of the following equations correctly represents alpha decay of ?

A 30.0-kg child receives 2.65 *10⁷ $\beta$ particles, each with an energy of 4.60 *10¯¹³ J. If the RBE = 0.78, how many millirem did the child receive?

Which of the following materials is put into a nuclear reactor to slow the chain reaction?

Who discovered radioactivity?

Fill in missing sub- and superscripts for all particles to complete the following equation for positron decay.

Select the nuclide that completes the following nuclear reaction:

A 9.52 * 10¯⁵ mol sample of rubidium-86 emits 8.87 * 10¹⁶ $\beta$ particles in one hour. What is the half-life of rubidium-86?