The chemical element that has the symbol Na is Sodium.
Sodium is a soft, silvery-white metal that is highly reactive, especially with water. It belongs to the alkali metals group in the periodic table and is known for its essential role in biological systems. Sodium is commonly found in nature in the form of compounds, such as sodium chloride, which is table salt. Due to its reactivity, sodium is typically stored in oil or inert gases to prevent it from reacting with moisture in the air. The symbol ‘Na’ comes from the Latin word ‘Natrium,’ which is derived from natron, a natural mineral from which sodium was first isolated.