1.解:H E 1、,2 卩=E 解基态价电子组态N2:(l)2(1o2(1)(2o2 O2:(o23(o2*)(2p)2(7x2(m2)2(m2my)(2 MO解释? 3.解:Cl2:(3)(o3)(3p)2(3m)2(3m)2(m2(x1m)2 S=0,A=0,所以基态光谱项:∑ CN:(1o)2(2o)2(17)(3o) S=12,A=0,所以基态光谱项:2∑1. 解:H- : He+ : E r r r = − − − − + 1 2 1 2 2 2 2 1 1 1 1 2 1 2 1 E r = − − 2 2 1 2 2. 解:基态价电子组态 N2:(1g ) 2 (1u ) 2 (1u ) 4 (2g ) 2 O2:(2s) 2 (2s*)2 (2pz) 2 (2px) 2 (2py) 2 (2px *) 1 (2py*)1 MO解释? 3. 解:Cl2:(3s) 2 (3s*)2 (3pz) 2 (3px) 2 (3py) 2 (3px *) 2 (3py*)2 S=0, =0, 所以基态光谱项:1 CN:(1) 2 (2) 2 (1) 4 (3) 1 S=1/2, =0, 所以基态光谱项:2