Composition of Nucleus — Prelims Questions

Which of the following statements about the composition of an atomic nucleus is INCORRECT?

A nucleus is represented as $^{27}_{13} \text{Al}$. How many protons, neutrons, and nucleons are present in this nucleus?

Which of the following pairs represents isotopes?

The radius of a nucleus is given by $R = R_0 A^{1/3}$, where $R_0 = 1.2 \times 10^{-15},\text{m}$. What is the approximate radius of a nucleus with mass number $A = 64$?

Which of the following statements best describes the nature of the strong nuclear force?

If a nucleus has 15 protons and 16 neutrons, what is its atomic number ($Z$) and mass number ($A$)?

Which of the following statements correctly describes the nuclear density?