【評論主題】3. Which of the following bonds would be the most polar without being considered ionic?(A) C-O (B) M

【評論內容】

Si-O ，N-O ，C-O ，O-O共價鍵

且Si-O兩原子之電負度相差最大

【評論主題】1. How many unpaired electrons are found in Mn ?(A) 4 (B) 5 (C) 1 (D)0 (E) 2

【評論內容】

Mn3+剩下3d4 不可以把d軌電子弄成對 形成4對未鍵結電子對