Sodium is a silver-white cubic metal, which is soft and light and can be cut with a knife. Its density is 0.97g/cm3, melting point is 97.865438 0℃ and boiling point is 882.9℃. The new section has silvery white luster, which is oxidized to dark gray in the air and has corrosion resistance.

Sodium is a good conductor of heat and electricity and has a good magnetic conductivity. Potassium-sodium alloy (liquid) is the heat conductor of nuclear reactor. Sodium also has good ductility and low hardness, and can be dissolved in mercury and liquid ammonia to form a blue solution. Hardening at -20℃.

Chemical reaction equation of sodium:

4Na+O2=2Na2O (normal temperature)

2Na+O2=Na2O2 (heated or ignited)

2Na+2H2O=2NaOH+H2↑

2Na+2CO2=Na2CO3+CO

2na+2roh = 2Rona +H2 = (Roh stands for low alcohol)

Storage method

Storage method of sodium: soak in liquid paraffin, mineral oil and benzene series for sealed preservation, and a large amount of sodium is usually stored in an iron drum filled with argon for sealed preservation.

In a small amount of preservation that does not require high purity, it can be soaked in kerosene, such as laboratory preservation. Store in a cool and dry place, away from fire and heat sources. A small amount is usually kept in liquid paraffin. It is stored and transported separately from oxidants, acids and halogens.