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Atom with the electron configuration of 1S\(^2\)2S\(^2\)2P\(^6\)3S\(^2\) belongs to

Chemistry
JAMB 2025

Atom with the electron configuration of 1S\(^2\)2S\(^2\)2P\(^6\)3S\(^2\) belongs to

  • A. Group 3 and Period 2
  • B. Group 8 and Period 3
  • C. Group 2 and Period 3
  • D. Group 2 and Period 6
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Correct Answer: Option C
Explanation

Magnesium (Mg) belongs to Group 2 (the Alkaline Earth metals) and Period 3 of the periodic table, meaning it has 2 valence electrons and three electron shells, placing it in the s-block. 

There is an explanation video available below.

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