Lithium is very active. It can react with oxygen, nitrogen, carbon dioxide, water, ethanol, acid, etc. at different temperatures. When heated and melted, it reacts strongly with hydrogen, carbon, silicon, and most other elements. Lithium and its compounds, as high-quality Zip fuel, have the advantages of high combustion temperature, fast combustion speed, wide flame, large calorific value per unit weight, fast exhaust speed, etc. Lithium compounds are univalent Ionic compound.

　　Lithium hydride and Lithium borohydride are the most ideal portable hydrogen sources. Lithium hydride reacts violently with water. Fine powdered hydrides can cause ignition in water vapor or humid air. At room temperature, Lithium hydride does not react with dry oxygen, nitrogen, chlorine and hydrogen chloride, but when heated, the reaction is intense. The reaction with chlorine and oxygen is accompanied by an explosion. At high temperatures, Lithium hydride can react strongly with silica and silicate, so vessels made of glass, quartz and ceramics cannot be used as containers for melting Lithium hydride.

　　At room temperature, lithium hardly reacts with oxygen, but when the temperature rises above 200 ℃, the reaction is very intense. Lithium does not form peroxides when directly combined with oxygen. When the temperature is higher than 1000 ℃, Lithium oxide reacts with most metals and metal oxides, resulting in serious corrosion. At 1000 ℃, platinum, gold and nickel are stable to Lithium oxide.

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