阿摩線上測驗
5. Sodium oxide (Na2O) crystallizes in a structure in which the 
ions are in a face-centered cubic lattice and the Nat ions are in tetrahedral holes. What is the number of 
ions in the unit cell?
(A)2
(B)4
(C)6
(D)8
(E)none of these
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統計： A(0), B(1), C(0), D(0), E(0) #3483667
統計： A(0), B(1), C(0), D(0), E(0) #3483667
