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(C) Boron and silicon exhibit a diagonal relationship due to their similar ionic potential (charge/size ratio). One of the key characteristics of this

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Both form acidic oxides which dissolve in alkali to form borates and silicates respectively

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(C) Boron and silicon exhibit a diagonal relationship due to their similar ionic potential (charge/size ratio). One of the key characteristics of this relationship is that both elements form acidic oxides ($B_2O_3$ and $SiO_2$) which dissolve in strong alkali solutions to form borates and silicates,respectively. $B_2O_3 + 2NaOH \rightarrow 2NaBO_2 + H_2O$ $SiO_2 + 2NaOH \rightarrow Na_2SiO_3 + H_2O$

Which of the following properties describes the diagonal relationship between boron and silicon?

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