WAEC - Chemistry (2018 - No. 19)

The valence electrons of \(_{12}Mg\) are in the
3s orbital
2p\(_{x}\)
2s orbital
1s orbital

Explanation

\(_{12}Mg = 2, 8, 2\)

\(= 1s^{2} 2s^{2} 2p^{6} 3s^{2}\)

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