2. At room temperature, the molybdenum rods are stable in air, but when the temperature reaches 400 degrees Celsius, a slight oxidation occurs, when the temperature reaches the temperature of 600 degrees Celsius, the violent oxidation is occurred to generate MoO3. But at 1500 degrees, it can react with nitrogen to form molybdenum nitrides. Above 1100 to 1200 degrees, it can react with carbon, carbon monoxide and hydrocarbons to form carbides such as MoSi2. This MoSi2 is still quite stable even in the 1500 to 1700 degrees oxidation atmosphere, which will not be oxidation decomposition.
The molybdenum atom has two incomplete electronic layers, which can be 2,3,4,5 or 6 valence in a variety of molybdenum rods, meaning that molybdenum can form many kinds of compounds. However, the main compounds of molybdenum are oxide, molybdic acid and various types of molybdate.
