Metals and Non-metals Q7 — Class 10 Chemistry Solution

Chemistry-10th Metals and Non-metals CBSE Board 2025 Medium

The formation of magnesium oxide is correctly shown in option :

(a)One $Mg$ atom transfers both of its outer electrons to a single $O$ atom, giving $Mg^{2 +}$ and one oxide ion with a complete octet, written $[O]^{2 -}$ .
(b)One $Mg$ atom transfers a single electron to one $O$ atom, giving $Mg^{+}$ and one $[O]^{-}$ ion.
(c)One $Mg$ atom transfers one electron to each of two $O$ atoms, giving $Mg^{2 +}$ and two $[O]^{-}$ ions, written $[O]_{2}^{-}$ .
(d)Two $Mg$ atoms transfer electrons to a single $O$ atom, giving $[Mg^{2 +}]_{2}$ and one $[O]^{2 -}$ ion.

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