The mass number of a nuclide is 64. What is its nuclear radius?

Mass number of a nuclide is 216, its approxmiamte radius in fermi units is

Mass number of a nuclide is 216, its approxmiamte radius in fermi units is

Two nuclei have mass numbers in the ratio 1:64. What is the ratio of their nuclear radii?

By what factor must the mass number A change for the nuclear radius to double?

In every 45 minutes, the number of nuclei of a radionuclides becomes 80 % of its number before 45 minutes, then the time (in minute) in which the number of nuclei of that nuclide becomes 64% of its initial number is

The graph between log R and log A where R is the nuclear radius and A is the mass number is.