Chapter 1.1, Problem 1P

While the most common isotope of nitrogen has a mass number of $14$ (nitrogen- $14$), a radioactive isotope of nitrogen has a mass number of $13$ (nitrogen- $13$). Nitrogen- $13$ is used in PET (positron emission tomography) scans by physicians to monitor brain activity and diagnose dementia. For each isotope, give the following information: (a) the number of protons; (b) the number of neutrons; (c) the number of electrons in the neutral atom; (d) the group number; and (e) the number of valence electrons.