Exam 32: Nuclear Physics and Nuclear Radiation

A certain substance has a half-life of 5.0 hours. How many nuclei of the substance are required to give an initial activity of 6.0 μCi? 1 Ci = 3.7 × 10¹⁰ Bq.

The activity of a sample reduces from 7.55 × 10⁹ Bq to 5.11 × 10⁹ Bq in 5.50 months. (a) What is the half life? (b) How many months must one wait for the activity to decrease to 10%?

Rutherfordium-261 has a half-life of 1.08 min. What is the decay constant of rutherfordium?

Suppose that in a certain collection of nuclei there were initially 1024 nuclei and 20 minutes later there was only one nuclei left, the others having decayed. On the basis of this information, how many nuclei would you estimate decayed in the first 6 minutes?

The symbol for a certain isotope of polonium is . How many neutrons are there in the nucleus of this isotope?

Quarks can only have a charge of +(2/3)e or -(1/3)e, while antiquarks can only have charges of -(2/3)e or +(1/3)e.

One type of event that may generate gravity waves of sufficient strength to be detected with current equipment is the death spiral of a neutron star as it plunges into a black hole.

The symbol for a certain isotope of radium is . How many nucleons are there in the nucleus of this isotope?

How much energy is required to remove one proton from ⁹Be?