As the mass number A increases, which of the following quantities related to a nucleus do not change?

The average radius of a nucleus is given by

Where is the mass number and m.

The Volume of the nucleus is given by (Putting equation (1))

Since, the number of protons and neutrons are nearly same, say , the Mass is approximately equal to

Density is given by

The above equation of density says that it is independent of A. So as mass number A increases, density do not change.