Vitamin B12, also known as cyanocobalamin, is a water-soluble vitamin that is part of the B vitamin family. B vitamins help support adrenal function, help calm and maintain a healthy nervous system, and are necessary for key metabolic processes.
For each of the 80 stable elements, the number of the stable isotopes is given. Only 90 isotopes are expected to be perfectly stable, and an additional 163 are energetically unstable, but have never been observed to decay. Thus, 253 isotopes (nuclides) are stable by definition (including tantalum-180m, for which no decay has yet been observed).
The number of neutrons is 22 (for the most stable isotope of argon, Ar-40) because you subtract the atomic mass from the atomic number then estimate! The most common isotop â¦ e of Argon, 40Ar, (comprising about 99.6% of all naturally occurring Argon) has 22 neutrons 18 electrons 18 protons. Argon has 24 known isotopes ranging from 30Ar (with 12 neutrons) to 53Ar (with 35 neutrons).