钠（Na）元素及金属钠的用途

In this paper, the physical and chemical properties and save method of the Na and metal sodium were analyzed, the Na should be saved in the kerosene and liquid paraffin. And the application of them was summarized as: (1) Na element plays an important role in the physiological function of the human and animal body, and maintaining the acid-base balance of the cell osmotic pressure and blood, and participates in the water metabolism. (2) the difference of the Na content has an impact on the species and vegetation, with the increase of the sodium content in the soil, the species diversity and species abundance are down,; (3) Na element and metal sodium are widely used in the science and technology field, such as: the production of fireworks, cable, anti-explosion agent, polymer/earth composite materials, dyes, reductant, etc.