Obtain approximately the ratio of the nuclear radii of the gold isotope and the silver isotope

Question

Obtain approximately the ratio of the nuclear radii of the gold isotope ¹⁹⁷₇₉Au and the silver isotope ¹⁰⁷₄₇Ag

Answer 1

Mass number of gold, A_Au = 197
Mass number of silver, A_Ag = 107
The ratio of the radii of the two nuclei is related with their mass numbers as:

Hence, the ratio of the nuclear radii of the gold and silver isotopes is about 1.23.