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Question

What is the electronic configuration of magnesium ( 2412Mg )?

A
2,6,3
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B
2,8,2
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C
2,8,3
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D
2,6,4
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Solution

The correct option is B 2,8,2
The atomic number of magnesium is 12.
The maximum number of electrons that the K, L, M shells can accomodate are 2,8,18 respectively.

Hence, the electronic configuration of magnesium is-
ShellKLMNo. of electrons 2 8 2

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