Four elements P,Q, R and S have atomic numbers of 4, 10, 12 and 14…

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Chemistry JAMB 1989

Four elements P,Q, R and S have atomic numbers of 4, 10, 12 and 14 respectively . Which of these electrons is a noble gas?

  • P
  • Q checkmark
  • R
  • S

The correct answer is: B

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