Cyanocobalamin is the most common and widely produced form of the chemical compounds that have vitamin B12 activity.
For example, the hadron constituents of atomic nuclei, neutrons and protons, have charges of 0 e and +1 e respectively; the neutron is composed of two down quarks and one up quark, and the proton of two up quarks and one down quark.
It depends on the atom. If you know the atomic number, that's how many protons are in the nucleus. For example, an oxygen atom has 8 protons, iron has 26, and uranium has 92. Views Â· 1 Upvote.