Given the isotope zinc-65, HOW would you calculate the number of neutrons it has? Describe the process AND list your answer. PLEASE HELPPP

In order for a high temperature boiler or steam engine to produce superheated water, or steam: the heat source must be greater than 100°c the water must be permitted to evaporate quickly the system must be sealed and become pressurized above atmospheric pressure the vapor pressure must be kept below 760 mm(hg)