What is NI3? Important knowledge about NI3

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1. Definition of NI₃
   NI₃, also known as Nitrogen triiodide in English, is an unstable chemical compound containing nitrogen and iodine. The NI₃ molecule consists of one nitrogen atom (N) and three iodine atoms (I). The atomic mass of nitrogen is 14, while that of iodine is 127. Therefore, the atomic mass of NI₃ is 395 (about 14 for nitrogen and 381 for three iodines). Regarding ion structure, NI₃ does not have ions because it is not a salt.

2. Properties: NI₃
   NI₃ is a black or dark purple solid, odorless and its pH cannot be determined because it is insoluble in water. In terms of chemical properties, NI₃ is very sensitive, prone to explode when exposed to light, high temperature or shock.

3. Common chemical equation of NI₃
   Due to the instability and explosiveness of NI₃, it is not commonly used in normal chemical reactions. However, the decomposition reaction of NI₃ is a typical example: 2NI₃(s) -> N₂(g) + 3I₂(g) -> .

4. Synthesis of NI₃
   NI₃ is usually prepared in the laboratory by adding ammonia (NH₃) to a solution of I₂ in ether. However, due to the explosive nature of NI₃, this reaction needs to be carried out with great caution. In the industry, NI₃ is not produced due to its hazardous and unstable nature.