1. R = R0 A1/3 .
2. Density of nucleus = (mass of the nucleus)/ (volume of the nucleus)
\(\frac{mA}{\frac{4}{3}\pi R^3}=\frac{mA}{\frac{4}{3}\pi R^3_0A}\) = \(\frac{m}{\frac{4}{3}\pi R_0^3}\)
This shows that nuclear density is independent of mass number.