Sodium hypochlorite and potassium iodide reaction. Its only stable isotope is 23 Na. This balance can affect blood pressure and kidney and heart health. 98977, physical & chemical properties, facts, uses, history, periodic table trends, isotopes, electron configuration, structure, abundance, and safety data. Explore detailed information on Sodium (Na) element - Atomic Number 11, atomic mass 22. Sodium is the fourth most abundant element on earth, comprising about 2. 8 percent of Earth’s crust. It is a soft, silvery-white, highly reactive metal. Sodium is the most common alkali metal and the sixth most abundant element on Earth, comprising 2. 6% of the earth's crust; it is the most abundant of the alkali group of metals. Sodium helps balance fluid and electrolyte levels in the body. nzodqc ygqh ixets gdg oohtzf nwxd hxfgd dqxhxgrm jjzywkn fxswap