How is nuclear density independent from mass number?

Hello Fatima, nuclear density is given by the expression 3/4 * m_N / pi r_o^3. Here m_N is mass of the nucleon which equals to 1.67 x 10^-27 kg and r_o = 1.3 x 10^-15 m and pi = 3.14. This expression no way has the mass number A. Hence the statement. read more

Density is mass/volume,considering the mass of each nucleon is m and mass number is A(number of nucleons ) then total mass of nuclear matter is mA. Now, volume of nucleus,considering it to be perfect sphere is 4/3 x3.14 x r^3. nuclear radius is dependent on the cube root of A i.e A^1/3. so r^3 is dependent on A. read more