The graph of ln(R/R0) versus ln A(R = radius of a nucleus and A = its mass number) is
a straight line
none of them.
(a) a straight line
The average nuclear radius (R) and the mass number of the element (A) has the following relation :
`R = R_0A^(1/3)`
`R"/"R_0 = A^(1/3)`
In `(R"/"R_0) = 1/3 "In A"`
Therefore, the graph of ln(R/R0) versus ln A is a straight line passing through the origin with slope 1/3.