The ratio of the radii of hydrogen atom and its nucleus is ~ 105. Assuming the atom and the nucleus to be spherical, (i) what will be the ratio of their sizes? (ii) If atom is represented by planet earth ‘Re’ = 6.4 ×106 m, estimate the size of the nucleus.
(ii) If the atom is represented by the planet earth (Re= 6.4 �106
m) then the radius of the nucleus would be rn = Re /105
rn = 6.4 x 106 m / 105
= 6.5 x 10 m
= 64 m
