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GK QUESTION#3315

In which numbered group of the periodic table is the element with electronic configuration [He]2s²2p⁶?

  1. A8
  2. B6
  3. C18Correct answer
  4. D10
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Answer

C. 18

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Explanation

The configuration [He]2s²2p⁶ has ten electrons and identifies neon. Its outer n=2 shell is filled, placing it in Group 18, the noble gases. The group number is not the total number of electrons.

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