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Q.1.    Use Mendeléev’s Periodic Table to predict the formulae for the oxides of
           the following elements:

           (d)   Si

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The general formula for the oxides of the element Silicon (Si):

Silicon belongs to the group IV of Mendeleev's periodic table, 

Hence, the formula of its oxide will be SiO_{2.}

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Divya Prakash Singh

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