Question 7**Show that the radius law \(R=R_0A^{1/3}\) implies nuclear volume is proportional to \(A\).
Question 8***Use \(R=R_0A^{1/3}\) and \(M\approx Au\) to show that nuclear density is approximately independent of \(A\).
Question 9***Estimate nuclear density using \(u=1.66\times10^{-27}\,\mathrm{kg}\) and \(R_0=1.2\times10^{-15}\,\mathrm m\).
Question 10*+A neutral atom has \(Z=17\) and \(A=35\). How many electrons, protons, and neutrons does it contain?
Question 12*An alpha particle is \(^{4}_{2}\mathrm{He}\). State its charge, proton number, neutron number, and nucleon number.
Question 13**A nucleus has radius \(7.2\,\mathrm{fm}\) with \(R_0=1.2\,\mathrm{fm}\). Estimate \(A\).
Question 14**+Two nuclei have the same radius within a simple \(R=R_0A^{1/3}\) model. What can you infer about their mass numbers?
Question 15***Why does the radius law support the idea that nucleons are packed with roughly constant separation?
Question 17***Explain why the atomic mass number \(A\) is close to, but not exactly equal to, the atomic mass in atomic mass units.
Question 18**Show that doubling the nuclear radius increases the approximate nucleon number by a factor of \(8\).
Question 19***+A scattering experiment estimates a nuclear radius. Explain why high-energy probes are needed to resolve nuclear size.
Question 20*****Prove that if nuclear density is constant and nuclear mass is proportional to \(A\), then \(R\propto A^{1/3}\).