問題詳情

19. The valence electron configuration of an element is

. To which group does Xbelong?
(A) Group 3A
(B) Group 4A
(C) Group 5A
(D) Group 6A
(E) Group 7A

參考答案

答案:B
難度:計算中-1
書單:沒有書單,新增