K A Tsokos Solutions for Chapter: Atomic, Nuclear and Particle Physics, Exercise 4: Exam-style questions

A sample contains a small quantity of a radioactive element with a very long half$‐$life. The activity is constant and equal to $A$. The temperature of the sample is increased. What are the effects if any, on the half$‐$life and activity of the sample?

Explain how the emission lines in the spectrum of a gas are evidence for discrete energy levels within atoms.

Explain why in their experiment Geiger and Marsden used an evacuated enclosure.

Explain why in their experiment Geiger and Marsden used a gold foil that was very thin.

Explain why in their experiment Geiger and Marsden used a beam of alpha particle that was very narrow.

State the name of the force responsible for the defection of the alpha particles in Geiger and Marsden experiment$:$ The electrostatic force, Magnetic force, Strong gravitational force.

Describe the deflections of the alpha particles by the gold foil in Geiger and Marsden experiment.

Outline how the results of the Geiger and Marsden experiment led to the Rutherford model of the atom.