The common name for the element Na is sodium. It is a highly reactive alkali metal, known for its soft texture and bright metallic luster. Sodium is essential in various biological processes and is commonly found in nature, mainly as sodium chloride (table salt). In addition to its role in the human body, sodium is important in industry for producing glass, textiles, and detergents. Its reactivity with water forms sodium hydroxide and hydrogen gas, making it a subject of interest in chemical reactions and safety precautions.