出典:Wikipedia
出典:『Wikipedia』 (2011/06/01 02:29 UTC 版)
The nitrate ion is a polyatomic ion with the molecular formula NO−
3 and a molecular mass of 62.0049 g/mol. It is the conjugate base of nitric acid, consisting of one central nitrogen atom surrounded by three identical oxygen atoms in a trigonal planar arrangement. The nitrate ion carries a formal charge of negative one, where each oxygen carries a −2⁄3 charge whereas the nitrogen carries a +1 charge, and is commonly used as an example of resonance. Like the isoelectronic carbonate ion, the nitrate ion can be represented by resonance structures: