(a) describe rutherford's experiment and how the results revealed the nuclear structure of the atom. (b) consider the 23na atom. given that the radius and mass of the nucleus are 3.04 x 10^-15 m and 3.82 x 10^-23 g, respectively, calculate the density of the nucleus in g/cm^3. the radius of a 23-na atom is 186 pm. calculate the density of the space occupied by the electrons outside the nucleus in the sodium atom. do your results support rutherford's model of an atom? (the volume of a sphere of radius r is 4/5ïr^3