因材料没学好 故想请问大大 可否帮忙解个题目? 感激不尽 1:explain the point symmetry mm2 of methylene dichlorid CH2Cl2 ? 2:starting with cubic close packing(F.C.C) of oxygen ions? i:how many tetrahedral and octahedral sits are there per unit cell? ii:what oxide would u get if 1/2 of the octahedral sites are filled? iii:repeat(ii),2/3 of the octahedral sites are filled? iv:repeat(ii),all of the octahedral sites are filled? v:repeat(ii),all of the tetrahedral sites are filled? --

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