Sodium21
Sodium21 is a hypothetical isotope of the element sodium. Sodium, with the chemical symbol Na and atomic number 11, is a common alkali metal. Isotopes of an element have the same number of protons but different numbers of neutrons. Therefore, Sodium21 would have 11 protons and 10 neutrons in its nucleus, giving it a mass number of 21.
Naturally occurring sodium is primarily composed of the isotope Sodium-23, which has 11 protons and 12 neutrons.
The properties of Sodium-21, such as its half-life and decay products, would depend on its specific nuclear