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(A, C) The electronic configuration of Silicon $(_{14}Si)$ is $1s^2 2s^2 2p^6 3s^2 3p^2$. In the $3p$ subshell,there are two electrons in separate orb

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$_{14}Si$ is $2$

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(A, C) The electronic configuration of Silicon $(_{14}Si)$ is $1s^2 2s^2 2p^6 3s^2 3p^2$. In the $3p$ subshell,there are two electrons in separate orbitals according to Hund's rule,resulting in $2$ unpaired electrons. Thus,option $A$ is correct.The electronic configuration of Phosphorus $(_{15}P)$ is $1s^2 2s^2 2p^6 3s^2 3p^3$. In the $3p$ subshell,there are three electrons in separate orbitals,resulting in $3$ unpaired electrons. Thus,option $C$ is correct.

Choose the correct alternatives. The number of unpaired electrons in an atom of:

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