Average radius of the nucleus is given by the equation,
[tex] R = R_{0}A^{\frac{1}{3}} [/tex]
R is the average nuclear radius
[tex] R_{0} is Fermi's constant = 1.1 *10^{-15} m [/tex]
A is the mass number = 18 protons + 22 neutrons = 40
Calculating the nuclear radius from mass number:
[tex] R = 1.1 * 10^{-15} m (40^{\frac{1}{3}}) [/tex]
[tex] R = 1.1 *10^{-15} m (3.42 ) [/tex]
[tex] R = 3.76 * 10^{-15} m [/tex]
