阿摩線上測驗
23. How many unpaired electrons are there in an atom of sulfur in its ground state?
(A) 1
(B) 2
(C) 4
(D)0
(E)3
答案：登入後查看
統計： A(0), B(12), C(3), D(2), E(1) #2735511
統計： A(0), B(12), C(3), D(2), E(1) #2735511
