阿摩線上測驗
44. An element with the electron configuration [Xe] 6s24f145d7 would belong to which class on the periodic table?
(A) transition elements
(B) halogens
(C) rare earth elements
(D) alkaline earth elements
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統計： A(4), B(0), C(0), D(0), E(0) #3840054
統計： A(4), B(0), C(0), D(0), E(0) #3840054
