HOW MANY PROTONS NEUTRONS AND ELECTRONS ARE IN MN?

Manganese (Mn) has an atomic number of 25, which means it has 25 protons and, in a neutral atom, 25 electrons. The most common isotope of manganese has a mass number of 55, which means it has 30 neutrons (55 - 25 = 30). Therefore, a neutral manganese atom contains 25 protons, 30 neutrons, and 25 electrons.