Which of the following correctly represents the electronic configuration of Magnesium (Atomic Number = 12)?

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A 2, 8, 1
B 2, 8, 2
C 8, 2, 2
D 2, 2, 8

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Answer: B. 2, 8, 2

Explanation: Magnesium has 12 electrons. Following the Bohr-Bury scheme: the K shell takes 2, the L shell takes 8, and the remaining 2 go into the M shell.

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Which of the following correctly represents the electronic configuration of Magnesium (Atomic Number = 12)?

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