English: Comparison of the plot of experimental nuclear radius to mass number for every stable element (blue line) compared with the assumption that all nuclei have a spherical shape whose radii scales with the cube root of the mass number (green line) according to the formula R=A^(1/3). The spherical radius prediction where underestimates the erratic radius-to-mass number relationship of the light nuclides where A<40 amu (all isotopes plotted), and overestimates the radius-to-mass number for medium to heavy nuclides where A>40 amu (only most abundant isotope of each element is plotted).
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Captions
Comparison of experimentally measured nuclear radii (blue) with radius prediction based on the assumption that the nucleus is a sphere (green)