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(B) The electronic configuration $1s^2 2s^2 2p^6 3s^1$ corresponds to Sodium $(Na)$,which is an alkali metal with a valency of $+1$.Oxygen has an elec

Vedclass · Accepted Answer

$M_2O$

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(B) The electronic configuration $1s^2 2s^2 2p^6 3s^1$ corresponds to Sodium $(Na)$,which is an alkali metal with a valency of $+1$.Oxygen has an electronic configuration of $1s^2 2s^2 2p^4$ and requires $2$ electrons to complete its octet,thus having a valency of $-2$.To form a neutral oxide,two metal atoms $(M^+)$ combine with one oxygen atom $(O^{2-})$.Therefore,the formula of the oxide is $M_2O$.

The electronic configuration of a metal is $1s^2 2s^2 2p^6 3s^1$. The formula of its oxide is:

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