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Unilorin Post-UTME Chemistry 2021 (Model questions) Question 8

Question 8

Atomic Structure

Which of the following electronic configurations represent that of a noble gas?

  1. A.2,6,8,2
  2. B.2,8,2
  3. C.2,8
  4. D.2,6
Show the answer and explanation

Answer: C (2,8)

Explanation

2,8 (neon) has a full outer shell of eight electrons, which is typical of noble gases.