→ catlin0917:X---1/8*8+1/2*6=4 08/07 20:15
→ catlin0917:Y---夾在角落一顆與面上3顆X的中間 共4顆 08/07 20:17
可以請高手教我這題嗎,
真的謝謝>"<
以下
A compound contains two types of atoms, X and Y. It crystallizes in a
cubic lattice with X atoms at corners and faces of the unit cells and Y
atoms at the tetrahedral sites. The formuls of this compound is:
(A)X8Y (B)X2Y (C)XY (D)XY2 (E)XY8
答案為(C)
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