The infinitely extended silicate ion shown in the picture below combines with calcium and magnesium to form the mineral diopside.What is the formula and charge of the repeating unit of the silicate ion? A)SiO₃^2- B)Si₂O₆^4- C)Si₃O₁₀^8- D)Si₆O₂₄^24-

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Quizplus · Accepted Answer

The repeating unit of the silicate ion is (SiO3)2-, as there are three oxygen atoms for every one silicon atom, and the ion has a charge of -2. Therefore, the formula for the diopside mineral is (Ca,Mg)Si2O6, where the silicate ion is repeated twice to balance the charge. Choice B is the only option that includes (SiO3)2- as a repeating unit and also includes the correct formula for diopside.

The Infinitely Extended Silicate Ion Shown in the Picture Below