Answer of 1. Y is a proton and Z is a neutron; 2. Protons and neutrons
A typical atom consists of three subatomic particles. These are protons, neutrons, and electrons. In the center of every atom nucleus is present. Nucleus is a small, dense area at the center, composed of nucleons. Nucleons include protons and neutrons. All the positive charge of an atom is contained in the nucleus as protons are positive charged. Neutrons are neutrally-charged. Electrons are negatively-charged are located outside of the nucleus and revolving in orbits.