Nuclear Radius

Q.

What will be the radius of ${}^{64}Cu$ nucleus if the radius of ${}^{27}Al$ Al nucleus is $R_{Al}$ ?

1. $R_{Cu}=\frac{4R_{Al}}{3}$

2. $R_{Cu}=\frac{3R_{Al}}{4}$

3. $R_{Cu}=\frac{5R_{Al}}{3}$

4. $R_{Cu}=\frac{2R_{Al}}{3}$

Q. Two $C{u}^{64}$ nuclei touch each other. The electrostatics repulsive energy of the system will be

1. 0.788 MeV
2. 126.15 MeV ​
3. 788 MeV ​
4. 7.88 MeV