<unk>  is a chemical element. It has the symbol<unk>   and atomic number 19. The name<unk> " comes from the word<unk> h", as<unk>  was first isolated from<unk> h.<unk>  is a soft silvery-white metallic alkali metal that occurs naturally bound to other elements in seawater and many minerals. It oxidizes rapidly in air and is very reactive, especially towards water.  In many respects,<unk>  and sodium are chemically similar, although organisms in general, and animal cells in particular, treat them very differently.
Potassium
Phosphate
Sodium phosphates
Albumin
Phosphorous acid
Ammonia
Creatinine
Sulfate