Section One The general Properties of Elements of the Nitrogen Group 1. Know the following 1) Valence shell configuration nsn 2) Nonmetal→ metalloid→ metal 3) Oxidation number:0、+3、+5 4) Bonding character 2. Inert electron pair effect: the same group, the stability will increase from up to down when the elements have lower oxidation number; but the stability will decrease from up to down when the elements have higher oxidation number 第3页 2006-02-22第 3 页 2006-02-22 3 Section One The General Properties of Elements of the Nitrogen Group 1. Know the following: 1) Valence shell configuration ns2 np3 2) Nonmetal → metalloid → metal 3) Oxidation number: 0、+3、+5 4) Bonding character 2. Inert electron pair effect: In the same group, the stability will increase from up to down when the elements have lower oxidation number; but the stability will decrease from up to down when the elements have higher oxidation number