Elementary particle with a positive electrical elementary chargeSmallest electric charge unit (1.6021·10 Coulomb). The elec... and a mass of 1.67262158 · 10-24 g, which is equal to about 1836 times the electronElementary particle with a negative electrical elementary ch... mass. Protons and neutrons together form the atomic nucleusPositively charged nucleus of an atom. Its diameter amounts .... The number of protons in the atomic nucleusPositively charged nucleus of an atom. Its diameter amounts ... is determined by the chemical elementChemical base material which cannot be chemically converted ... allocated to this atomSmallest particle of an element which cannot be chemically d.... (See ‘elementary particle’).