Atoms And Nuclei

Assume that protons and neutrons have equal masses. Mass of a nucleon is \(1.6\times10^{-27}\) kg and radius of nucleus is \(1.5\times10^{-15}~\mathrm{A^{1/3}}\) m. The approximate ratio of the nuclear density and water density is \(n\times10^{13}\). The value of \(n\) is __________.