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The answer if 1 st isThe electronic configuration of element M is 2,8,4 . The element is Silicon. It is in group 14 of modern periodic table.
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explanation:
iv.As the element M belongs to group 13th of the periodic table so it has 3 valence electrons, i.e., it can have +3 oxidation state while oxygen atom (with 2 valency) has −2 oxidation state. So the formula for the corresponding oxide is m2o3.
v. The number of valence electrons does not increase while moving down the group in the periodic table.
Answer:
iv. m203.
v. velence electrons.
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