Problem 08 An unknown nucleus has twice the volume nucleus with 67 nucleons What the atomic mass number of the atom?
The atomic mass number is the total number of nucleons (protons and neutrons) in the nucleus.
If the unknown nucleus has twice the volume of a nucleus with 67 nucleons, it means that it has twice the number of nucleons.
Therefore, the atomic mass number of the unknown nucleus would be 2 times 67, which equals 134.