Platinum (Pt), with a mass number of 188 and an atomic number of 78, decays by emission of an alpha particle. Identify the product of the nuclear reaction by providing its atomic symbol, mass number, and atomic number.Tungsten (W), with a mass number of 185 and an atomic number of 74, decays by positron emission. Identify the product of the nuclear reaction by providing its atomic symbol, mass number and atomic number.