Elementary particle with a positive electrical Smallest electric charge unit (1.6021·10-19 Coul... and a mass of 1.67262158 · 10-24 g, which is equal to about 1836 times the Elementary particle with a negative electrical elementary ch... mass. Protons and neutrons together form the atomic Positively charged nucleus of an atom. Its diameter amounts .... The number of protons in the atomic Positively charged nucleus of an atom. Its diameter amounts ... is determined by the chemical Chemical base material which cannot be chemically converted ... allocated to this Smallest particle of an element which cannot be chemically d.... (See ‘elementary particle’).