valence-shellBNC¹²⁶⁴¹⁶⁺⁴ 基本例句 价电子层 The spatial configurations and bonding effects of Oxides of Nitrogen were explained by using the Valence-shell Electron Repulsion Theory, Hybrid- orbital Theory and Molecular orbital Theory. 用杂化轨道理论和分子轨道理论阐明了氮的氧化物成键类型，给出了分子空间构型及结构数据的解释。 dictall