20. Which of the following metals is not a transition element?
(A) Mn
(B) Zn
(C) Rh
(D) Os
(E) Au
答案:登入後查看
統計: 尚無統計資料
統計: 尚無統計資料
20. Which of the following metals is not a transition element?
(A) Mn
(B) Zn
(C) Rh
(D) Os
(E) Au